-    i- 


GIFT 
MA.fi  10  1916 


Volume  Eight 


Number  One 


SCHOOL  OF  MINES 
AND  METALLURGY 


UNIVERSITY  OF  (MISSOURI 


BULLETIN 

JANUARY  1916 


BIBLIOGRAPHY 

CONCENTRATING  ORES 
BY  FLOTATION 


Entered  as    second-class  matter   January  7,   1909,  at  the  postoffice  at  Rolla, 
Missouri,  under  the  act  of  July  18,  1894.      Issued  Quarterly. 


SCHOOL  OF  MINES 
AND  METALLURGY 

UNIVERSITY  OF  MISSOURI 


LIST  OF  REFERENCES  ON 

CONCENTRATING   ORES 

BY  FLOTATION 

Compiled  by  Jesse  Cunningham^  Librarian 


THE  MISSOURI   SCHOOL   OF  MINES  AND  METALLURGY,   THE    MISSOURI 

BUREAU    OF    GEOLOGY    AND  MINES    AND    THE    UNITED    STATES 

BUREAU   OF   MINES   are  making  cooperative  investigations   on  the  Milling  and 
Concentration  of  Missouri  Ores. 


ROLLA,  MISSOURI 
J9J6 


rn 
H 


LIBRARY  STAFF 


Jesse  Cunningham Librarian 

Mrs.  C.  W.  Bower Assistant 

Richard  Cooper .  .  .Student  Assistant 

Harry  J.  Schicrmeyer .  .Student  Assistant 


342074 


8 


TABLE  OF  CONTENTS 


Page 

Prefatory  note 7 

Abbreviations  used 9-10 

Bibliography  11 

General  works 11 

Articles  in  periodicals 1 1-43 

Colloids  and  surface  tension 44-51 

Litigation 51-54 

Patents  55-90 

Name  index  to  patents 91-93 

Author-Subject  index  ..  ....  94-104 

Publications  of  the  Missouri  School  of  Mines....  ...105-106 


MISSOURI   SCHOOIy  OF   MINKS. 

PREFATORY  NOTE. 


This  list  has  been  prepared  primarily  for  the  use  of  the  Min- 
ing Experiment  Station  and  students  of  the  School  of  Mines  and 
Metallurgy  engaged  in  experimentation  at  the  flotation  labora- 
tory of  this  institution,  and  is  based  on  the  collection  of  material 
now  in  the  library  of  the  school.  It  is  hoped,  however,  that  the 
list  will  serve  as  a  guide,  at  least  in  America,  to  the  study  of  the 
subject.  Emphasis  has  been  placed  on  no  particular  feature  of 
the  process,  the  intent  being  to  include  all  important  material 
coming  under  the  observation  of  the  compiler.  Articles  con- 
taining mere  mention  of  the  'name  of  a  process  or  the  name  of 
a  company  using  a  process  are  not  included. 

The  great  interest  in  the  subject  of  colloids  and  surface 
tension  in  its  connection  with  the  theory  of  oil  flotation  pro- 
cesses warrants  the  inclusion  of  a  section  devoted  to  references 
on  this  phase.  No  claim  for  completeness  is  made,  as  the  plan 
adapted  was  to  choose  from  the  mass  of  material  on  colloids 
and  surface  tension  the  better  known  standard  books  and 
articles,  and  to  include  enough  of  these  to  serve  as  a  basis  for 
further  study  and  experimentation. 

Acknowledgment  is  due  Theodore  Jesse  Hoover  for  a  lib- 
eral use  of  his  bibliography  in  the  second  edition  of  "Concen- 
trating Ores  by  Flotation" ;  to  the  libraries  of  St.  Louis, 
especially  the  St.  Louis  Public  and  the  Academy  of  Science,  for 
courtesies  extended,  and  to  Carl  Stifel  for  the  use  of  his  collec- 
tion of  United  States  patents.  The  list  has  profited  from  many 
valuable  suggestions  made  by  Professor  V.  H.  Gottschalk  of 
the  Department  of  Chemistry.  Professor  Gottschalk  is  deeply 
interested  in  the  theory  of  flotation,  especially  as  it  is  connected 
with  colloidal  chemistry  and  surface  tension.  His  expert 
knowledge  was  placed  at  our  disposal  without  reservation. 

The  table  of  contents  shows  the  arrangement  of  the  refer- 
ences. A  name  index  to  patents  follows  that  section.  An 
author-subject  index  appears  also  at  the  end,  pointing  out  the 
literature  on  special  and  more  minute  phases  of  the  subject. 
The  numbers  in  these  indexes  refer  to  items  and  not  to  pages. 

"V 

JESSE  CUNNINGHAM. 


MISSOURI   SCHOOL   OF   MINES.  9 

ABBREVIATIONS    USED. 

Aust.  Min.  Stand. — Australian  Mining  Standard. 

Austral.  Min.  &  Eng.  Rev. — Australian  Mining  and  Engineering  Review. 

B.  C.  Min.  Exch. — British  Columbia  Mining  Exchange. 

Bull.  Am.  Inst.  Min.  Engrs. — Bulletin  of  the  American  Institute  of  Mining 
Engineers. 

Bull.  Instn.  Min.  &  Metl. — Bulletin  of  the  Institution  of  Minftig  and 
Metallurgy. 

Can.  Min.  Jour.— Canadian  Mining  Journal. 

Can.  Min.  Rev. — Canadian  Mining  Review. 

Chem.  Metl.  &  Min.  Soc.  of  S.  Africa. — Journal  of  the  Chemical,  Metal- 
lurgical and  Mining  Society  of  South  Africa. 

Chem.  News. — Chemical  News. 

Electrochem.  &  Metl.  Indust. — Electrochemical  and  Metallurgical  Industry. 

Eng.  &  Min.  Jour. — Engineering  and  Mining  Journal. 

Eng.     Mag. — Engineering  Magazine. 

Jour.  Amer.  Chem.  Soc. — Journal  of  the  American  Chemical  Society. 

Jour.  Fr.  Inst. — Journal  of  the  Franklin  Institute. 

Jour.  Phys.  Chem. — Journal  of  Physical  Chemistry. 

Jour.  Soc.  Chem.  Indust. — Journal  of  the  Society  of  Chemical  Industry. 

Journ.  Can.  Min.  Inst. — Journal  of  the  Canadian  Mining  Institute. 

Metl.  £  Chm.  Engng. — Metallurgical  and  Chemical  Engineering. 

Mex.  Min.  Jour. — Mexican  Mining  Journal 

Min.  &  Eng.  R"ev. — Mining  and  Engineering  Review. 

Min.  &  Engng.  Wl'd. — Mining  and  Engineering  World. 

Min.  &  Metl.  Soc.  Amer. — Mining  and  Metallurgical  Society  of  America. 

Min.  &  Sci.  Pr. — Mining  and  Scientific  Press. 

Min.  Jour. — The  Mining  Journal  (London) 

Min.  Mag. — The  Mining  Magazine. 

Min.  Mag.   (N.  Y.)— Mining  Magazine  (New  York). 

Min.  Rept.-*— Mining  Reporter. 

Min.  Sci. — Mining  Science. 

Min.  Wld.  Index. — Mining  World  Index  of  Current  Literature. 

Mines  &  Meth. — Mines  and  Methods. 

Mines  &  Min. — Mines  and  Minerals. 

Minr.  Ind. — Mineral  Industry. 

Minr.  Res.  U.  S.— Mineral  Resources  of  the  U.  S. 

N.  S.  W.  Mines  Dept. — Annual  Report  of  the  Department  of  Mines  of 
New  South  Wales. 

Oesterreischische  Zeit.  f.  B.  u.  H. — Oesterreischische  Zeitschrift  fur  Berg- 
und  Huttenwesen,  Vienna. 

Pac.  Coast  Miner — Pacific  Coast  Miner. 

Phil.  Mag. — Philosophical  Magazine. 

Pop.  Sci.  M. — Popular  Science  Monthly. 

Roy.  Soc.  Viet.  Proc.— Proceedings  of  the  Royal  Society  of  Victoria. 


10  MISSOURI   SCIIOOI,   OF    MINI-IS. 

Seh.  Mines  Quar.— School  of  Mines  Quarterly. 

Sci.  Amer.  Supp.— Scientific  American  Supplement. 

Trclm.   Blatter — Technische  Blatter. 

Trans.  Am.  Electroch.  Soc. — Transactions  of  the  American  Electrochem- 
ical Society. 

Trans.  Am.  Inst.  Min.  Engrs. — Transactions  of  the  American  Institute 
of  Mining  Engineers. 

Trans.  Aust.  Inst.  Min.  Eng. — Transactions  of  the  Australasian  Institute 
of  Mining  Engineers. 

Trans.  Instn.  Min.  &  Metl. — Transactions  of  the  Institution  of  Mining 
and  Metallurgy. 

West.  Chem.  &  Metl. — Western  Chemist  and  Metallurgist. 

Zeit.  Anorg.  Chem. — Zeitschrift  fur  Anorganische  Chemie. 

Zeit.  Phys.  Chem.— Zeitschrift  fur  Physikalische  Chemie. 

Zts.  Oberschles  Berg-und  Huttenmannisch — Zeitschrift  Oberschles  Berg- 
und  Huttenmannisch. 

The  following  abbreviations   are  used   for   the   months  of  the  year: 
Ja.,  P.,  Mr.,  Ap.,  My.,  Je.,  Jl.,  Ag.,  S.,  O.,  N,,  1)., 


MISSOURI   SCHOOL  OF  MINKS.  11 

BIBLIOGRAPHY 

(References  marked  with  an  asterisk  are  not  in  the   School  of  Mines 

Library.) 

1  Crane,  Walter  R.     Index  of  mining  engineering  literature. 
2  v.  N.  Y.     1909-1912.     v.  1,  p.  61-63;   v.  2,  p.  33-34. 

2  Hoover,  Theodore  J.     Concentrating  ores  by  flotation. 
2<1  ed.     London.     1914,    p.  201-254. 

3  Mineral  Industry.    N.  Y.  1901-1915.    v.  19,  1900,  p.  784-785;  v.  20, 
1911,  p.  862-863;    v.  22,  1913,  p.  860;   v.  23,  1914,  p.  847-848. 

GENERAL  WORKS. 

4  Barr,  James  A.     Testing  for  metallurgical  processes. 
1st  ed.  San  Francisco.     1910.     p.  153-154;    200. 

5  Canada.     Zinc  Commission.     Report.     Ottawa.     1906. 
Flotation  processes,     p.  121-128. 

6  Clark,  Donald.    Australian  mining  and  metallurgy.    1907. 
p.  397-441.     Illus. 

7  Hoover,  Theodore  J.     Concentrating  ores  by  flotation.     Being 
a  description  and  history  of  a  recent  metallurgical  development, 
together  with  a  summary  of  patents  and  litigation.    London.    1914. 

Book  reviews  in: 

Min.  Mag.  v.  7,  p.  460-461;   D.  '12;   v.  11,  p.  207.     S.  '14. 
Min.  &  Sci.  Pr.  v.  106,  p.  164.     Ja.  '13. 
*Can.  Min.  Jour.     F.  15,  '13.     p.  122. 

8  Louis,  Henry.    The  dressing  of  minerals.    1909.  p.  442-449.    Illus. 

9  *Newton,  P.  M.,  compiler.     Flotation  processes.     Abridgements 
of  the  Australian  patents  and  other  details.    ISp.    Melbourne,  Vic- 
toria, 1911. 

10  Richards,  Robert  H.   Ore  dressing.  4  v.  and  index.    2nd  ed.  N.  Y. 
1906. 

p.  1075-1078;   1555-1565;  1719-1724;  1991-1992. 

11  Rickard,  T.  A.     ed.     The  flotation  process.     San  Francisco.  1916. 
Compilation  and  revision  of  articles  which   have  appeared  in  the 

Mining  and  Scientific  Press.    Announced  for  March,  1916. 

12  Walker,    T.   L.      Report    on   the    molybdenum   ores    of    Canada. 
Ottawa.  1911.     p.  11-14. 

ARTICLES    IN    PERIODICALS. 
1890. 

13  Criley  and  Everson  oil  process. 
Eng.  &  Min.  Jour.  v.  50,  p.  581  N.  15,  '90. 


12  MISSOURI   SCHOOL   OF   MINKS. 

1900 

14  Concentrating  antimony  ores. 

Eng.  &  Min.  Jour.  v.  70,  p.  515.    N.  3,  '00. 

15  Concentration  of  ores  by  wet  methods. 

Chern.  Metl.  &  Min.  Soc.  of  S.  Africa,    v.  10,  p.  28.    Jl.,  '00. 

16  Greenway,  T.  J.    The  concentration  of  the  Broken  Hill  (N.  S.  W.) 
sulphide  ores. 

Minr.  Ind.  v.  9,  p.  745-752.     1900.     Illus. 

17  McDermott,   Walter.      Notes    on    the    concentration    of    finely 
crushed  ores. 

Minr.  Ind.  v.  9,  p.  773-778.     1900. 

18  New  concentration  process. 

Min.  &  Sci.  Pr.  v.  81,  p.  278.    S.  8,  '00. 

19  Notes  on  the  Elmore  concentration  process. 
Eng.  &  Min.  Jour.  v.  69,  p.  742-743.     Je.  23,  '00. 

An  abstract  from  the  "Transactions  of  Institution  of  Mining  and 
Metallurgy.     Ap.  25,  '00. 

20  Rolker,  Charles  M.    Concentration  of  ores  by  petroleum. 
Min.  &  Sci.  Pr.  v.  81,  p.  40.    Jl.  14,  '00. 

21  Notes  on  the  Elmore  concentration  process. 
Trans.  Instn.  Min.  &  Metl.  v.  8,  p.  379-395.     1900.    Illus. 

1901. 

22  Concentration  of  ores  by  oil. 

Min.  &  Sci.  Pr.  v.  84,  p.  230.     Ap.  26,  '02. 

Min.  Jour.  v.  70,  p.  902.    Jl.  21,  '00;  v.  71,  p.  272.     Mr.  2,  '01. 

26  The  Elmore  concentrating  process 

Eng.  &  Min.  Jour.  v.  69,  p.  732.    Je.  23,  '00;  v.  70,  p.  393.     O.  6,  '00; 
p.  63-64.     Jl.  21,  '00;   v.  71,  p.  691.     Je.  1,  '01.     Illus. 

24  Milne,  David  and  Godfrey,  J.  R.     Joint  report. 
N.  S.  W.  Mines  Dept.     1901.    p.  79-81. 

1902 

25  The  Elmore  oil  concentrating  process. 

Eng.  &  Min.  Jour.  v.  74,  p.  371.     S.  20,  '02.     Illus. 

26  McDermott,  Walter.    The  concentrating  of  ores  by  oil. 
Minr.  Ind.  v.  11,  p.  697-707.     1902.    Illus. 

27  Milne,  David  and  Godfrey,  J.  R.    Joint  report. 
N.  S.  W.  Mines  Dept.     1902.     p.  69-72. 

28  Oil  process  for  ore  concentration. 
Min.  &  Sci.  Pr.  v.  85,  p.  207.     O.  11,  '02. 

29  The  Ore  Concentration   Syndicate,  Ltd.     Concentrating  molyb- 
denite. 

Eng.  &  Min.  Jour.  v.  74,  p.  188.    Ag.  9,  '02. 


MISSOURI   SCttOOr,  OF   MINES.  13 

1903 

30  British  Ore  Concentration  Syndicate,  Ltd. 
Eng.  &  Min.  Jour.  v.  75,  p.  156.     Ja.  24,  '03. 

31  The  Broken  Hill  "Salt-Cake  Process"  for  zinky  ores. 
Eng.  &  Min.  Jour.  v.  76,  p.  692.     N.  7,  '03. 

32  Concentration  by  oil. 

Eng.  &  Min.  Jour.  v.  75,  p.  250.     F.  14,  '03. 

33  Delprat's  method  for  separating  mixed  sulphide  ores. 
Eng.  &  Min.  Jour.  v.  76,  p.  846.     D.  5,  '03. 

34  Delprat  process. 

N.  S.  W.  Mines  Dept.  1903.     p.  42. 
Min.  &  Sci.  Pr.  v.  87,  p.  9.     Jl.  4,  '03. 

35  Elmore,  A.  Stanley.     Copper  sulphide  in  iron  ores. — Oil  concen- 
tration. 

Eng.  &  Min.  Jour.  v.  76,  p.  244.     Ag.  15,  '03. 

36  The  Elmore  process. 

Min.  &  Sci.  Pr.  v.  86,  p.  281.     My.  2,  '03.     Illus. 

37  McDermott,  Walter.     The  concentration  of  ore  by  oil. 

Eng.  &  Min.  Jour.  v.  75,  p.  262-263.    F.  14,  '03;  p.  292-294.    F.  21,  '03. 
Illus. 

38  Milne,  David  and  Godfrey,  J  R.    Joint  report 
N.  S.  W.  Mines  Dept.    1903.    p.  68-71. 

39  Molybdenite — Its  occurrence,  etc. 
Jour.  Can.  Min.  Inst.  v.  6,  p.  54.    1903. 

40  Oil  concentration.     The  Elmore  process. 

Minr.  Ind.  v.  9,  p.  743-744.    1900;  v.  10,  p.  759-761.    1901;  v.  11,  p.  656- 
657.     1902;  v.  12,  p.  412-413.    1903. 

41  Results  of  the  oil  concentration  process. 
Eng.  &  Min.  Jour.  v.  75,  p.  113.    Ja.  17,  '03. 

42  Sancton,  Arthur  H.     Costs  in  the  Elmore  process. 
Min.  &  Sci.  Pr.  v.  86,  p.  338.     My.  23,  '03. 

For  correction  see  ibid  87,  p.  392. 

43  The  Elmore  oil-concentration  plant.    A  description  of 
the  method  and  machinery  used  in  concentrating  copper  ores  at 
St.  David's  Mine,  North  Wales. 

Mines  &  Min.  v.  24,  p.  6-7.    Ag.  '03.    Illus. 

44  Separation  of  zinc  ores. 

Min.  &  Sci.  Pr.   v.  86,  p.  118-119.     F.  21,  '03. 

45  Van  Meter,  J.  W.    Aluminated  hydro-carbon  oil  in  the  concentra- 
tion and  separation  of  minerals. 

Eng.  &  Min.  Jour.  v.  76,  p.  820.    N.  2?,  '03. 


14  MISSOURI    SCHOOL  OF    MI\KS. 

4t;  Van  Meter,  J.  \\'.     A  system  of  eontimious  concentration  of  ores 

by  oil. 
Min.  &  Sci.  Pr.  v.  87,  p.  304.     N.  7,  'o:1,. 

1904 

47  Adams,  W.  J.    Concentration  of  low-grade  copper  ores. 

Min.  &   Sci.   Pr.  v.  88,  p.  315-316.     My.   7,  '04;    p.  328.     My.  14,  '04; 
p.  344.     My.  21,  '04;  p.  363-364.     My.  28,  '04. 

IS  Oil  concentrating. 

Min.  Mag.   (X.  Y.)  v.  10,  p.  45-47.     Jl.  '04. 

40  Bathurst,  F.  H.     Zinc  at  Broken  FTill. 

Kng.  &  Min.  Jour.  v.  78,  p.  871-S72.     D.  1,  '04. 

50  Clark,  Donald.     The  Delprat  or  salt-cake  process  for  mixed  sul- 
phides. 

Eng.   £   Min.   Jour.  v.   77,  p.   122.     Ja.   21,   '04. 

51  The  Potter  process. 

Eng.  &  Min.  Jour.  v.  78,  p.  394.     S.  8,  '04.     Illus. 

52  Elmore,  A.  Stanley.    Concentration  of  platinum  ores. 
Eng.  &  Min.  Jour.     v.  78  p.  438.     S.  15,  '04. 

53  Hamilton.  J.  F.     The  relative  attraction  of  some  common  min- 
erals for  residuum  oil. 

Jour.  Can.  Min.  Inst.  v.  7,  p.  185-191.    Mr.  '04. 

54  Laboratory  device. 

Min.  &  Sci.  Pr.  v.  88,  p.  115.    F.  13,  '04.    Illus. 

55  McDermott,  Walter.     Oil  for  concentration  of  ores. 
Eng.  &  Min.  Jour.  v.  77,  p.  152-153.     Ja.  28,  '04. 

56  The  Potter  sulphide  process 

Min.  &  Sci.  Pr.  v.  88,  p.  361.     My.  28,  '04. 

57  Ronnan,  Fred  P.     Cheticamp,  Cape  Breton. 
Eng.  &  Min.  Jour.  v.  77,  p.  283-284.     F.  18,  '04.     Illus. 

58  Zinc  tailings  at  Broken  Hill. 

Eng.  &  Min.  Jour.  v.  78,  p.  499.     S.  29,  '04. 

1905 

59  Broken  Hill  zinc. 

Kng.  &  Min.  Jour.  v.  80,  p.  928.    N.  18,  '05. 

60  *Claudet,  H.  H.    Elmore  at  Le  Roi  Mine. 
B.  C.  Min.  Exch.     F.  '05. 

61  Elmore,  A.  Stanley.    Concentration  of  molybdenite  ores. 
Eng.  &  Min.  Jour.  v.  80,  p.  118.    Jl.  22,  '05. 

62  Reason    for   failure    of   Elmore   porcess    at    Rossland. 
Can.  Min.  Rev.  v.  24,  p.  177.     1905. 


MISSOURI    SCHOOL   OF   MINKS.  15 

63  The  Elmore  process  for  diamond  recovery. 

Eng.  &  Min.  Jour.  v.  80,  p.  257.     Ag.  12,  '05. 

Gl  Improvements  in  ore  concentration. 

Eng.  &  Min.  Jour.  v.  80,  p.  643.     O.  7,  '05. 

G5  Ingalls,  W.  R.     Mixed,  sulphide  ore  treatment. 

Eng.  &  Min.  Jour.  v.  80,  p.  289-290.     Ag.  19,  '05. 

66  Le  Roi  No.  2,  Ltd. 

Eng.  &  Min.  Jour.  v.  79,  p.  201-202.     Ja.  26,  '05. 

67  Oil  concentration. 

Eng.  &  Min.  Jour.  v.  80,  p.  304.     Ag.  19,  '05. 

68  Frobert,  Frank  H.     Concentration  of  copper  ore. 
Eng.  &  Min.  Jour.  v.  80,  p  15.    Jl.  6,  '05.     Illus. 

G9  Selwyn-Brown,   A.     The   newer  'treatment   of   Broken   Hill   sul- 

phides. 
Eng.  &  Min.  Jour.  v.  80,  p.  385.     S.  2,  '05. 

1906 

70  Clark,  Donald.     The  flotation  process  at  Broken  Hill. 
Eng.  &  Min.  Jour.  v.  82,  p.  966.    N.  24,  '06. 

71  Concentration  at  Broken  Hill. 
Min.  &  Sci.  Pr.  v.  93,  p.  522.     N.  3,  '06. 

72  Concentration  of  silicious  copper  ore. 

Eng.  &  Min.  Jour.  v.  81,  p.  333-334.    F.  17,  '06;  p.  621-622.     Mr.  31,  '06. 

73  Huntington,  A.  K,     Flotation  processes." 

Eng.  &  Min.  Jour.  v.  81,  p.  314-317.     F.  17,  '06.     Illus. 

Abstract  of  a  paper  read  before  the  Faraday  Society,  D.  12,  '05. 

74  Ingalls,   W.   R.     The   flotation   processes.     Details   of  the   new 
method  of  ore  separation  at  Broken  Hill. 

Eng.  &  Min.  Jour.  v.  82,  p.  1113-1115.     D.  15,  '06.     Illus. 

75  The  Kirby  oil  process. 

Eng.  &  Min.  Jour.  v.  81,  p.  655.     Ap.  7,  '06. 

76  New  Developments  at  Broken  Hill. 
Electrochem.  &  Metl.  Indust.  v.  4,  p.  206-207.     Je.  '06. 

77  New  processes  at  Broken  Hill. 
Min.  &  Sci.  Pr.  v.  93,  p.  429.     O.  13,  '06. 

78  Ore  dressing  by  flotation. 

Electrochem.  &  Metl.  Indust.  v.  4,  p.  49-52.     F.  '06. 
An  account  of  two  Faraday  Society  papers  by  James  Swinburne  and 
Dr.  G.  Rudorf  and  Professor  A.  K.  Huntington. 

79  *Potter,  Delprat,  and  Defcavay  processes. 
N.  S.  W.  Mines  Dept.    1906.    p.  37. 

80  Snover,  G.  E.    Native  oil  concentration  in  Columbia. 
Eng.  &  Min.  Jour.  v.  82,  p.  266.    Ag.  11,  '06. 


16  MISSOURI    S(  llool,    Of-'    MI.Xl-S. 

81  Steckel,  A.  P.    Electromagnetic  flotation  processes. 
Electrochem.  &  Metl.  Indust.   v.  7,  p.  275.    Je.  '06.    Illus. 

82  Theory  and  practice. 

Eng.  &  Min.  Jour.  v.  82,  p.  1179.     D.  22,  '06. 

83  Walker,  Edward.    Zinc  concentration  in  Australia. 
Eng.  &  Min.  Jour.  v.  82,  p.  826.     N.  3,  '06. 

84  Zinc  processes  at  Broken  Hill. 
Min.  &  Sci.  Pr.    v.  93,  p.  492.     O.  27,  '06. 

1907 

85  Acid  flotation  processes. 

Electrochem.  &  Metl.  Indust.  v.  5,  p.  320-321.    Ag.  '07. 

86  The  Broken  Hill  Proprietary  Company. 
Eng.  &  Min.  Jour.  v.  84,  p.  689.    O.  12,  '07. 

87  Darrow,  Wilton  E.     Concentration  of  slime. 
Min.  &  Sci.  Pr.  v.  9",.  p.  268-269.    Ag.  31,  '07. 

88  *Debavay,    Gillies,    Minerals    Separation,    Elmore    ami    Delprat 
processes. 

X.  S.  W.  Mines  Dept.  1907.     p.  87. 

89  Delprat,  Guillaume  D.     The  lead-smelting  works  of  Port  Pirie. 
The  ores   from  the   Broken  Hill  plant  are  smelted  and  the  bul- 
lion refined  and  prepared  for  the  market. 

Eng.  &  Min.  Jour.  v.  83,  p.  516-519.     Mr.  16,  'C7.     Illus. 

90  Ore  dressing  at  Broken  Hill.     Equipment  for  crush- 
ing, concentrating  and  preparing  ores  for  smelting. 

Eng.  &  Min.  Jour.  v.  83,  p.  317-321.    F.  16,  '07.    Illus. 

91  *Elmore,  A.  S.     The  Elmore  process. 
Genie  Civil,  v.  51,  p.  144.     1907. 

Revue  de  Metallurgie.  v.  4,  p.  568.     1907.    Illus. 

Bulletin  de  la  Societe  de  L'Industrie  Minerale,  v.  8,  p.  199.     1907. 

92  The  Elmore  vacuum  process. 

Eng.  &  Min.  Jour.  v.  83,  p.  1110-1111.     Je.  8,  '07. 

93  The   Elmore   vacuum    process    of   ore    concentration. 
The  apparatus  used  and  the  principles  governing  its  operation. — 
Plants  installed. 

Mines   &   Min.   v.   28,   p.   24-25.     Ag.   '07.     Illus. 

94  Vacuum-flotation  process  for  concentration.     The  El- 
more  process   employs    reduced   pressure   to    increase   by    expan- 
sion the  lifting  power  of  gas  bubbles  in  a  liquid  medium. 

Eng.  &  Min.  Jour.  v.  83,  p.  908-909.    My.  11,  '07.    Illus. 

95  Elmore  vacuum  process  of  ore  concentration. 
Min.  Kept.  v.  55,  p.  537-538.     Je.  13,  '07.     Illus. 

96  The   Elmore    vacuum    process. 

Eng,  &  Min.  Jour.  v.  83,  p.  917.    My,  11,  '07. 


MISSOURI    SCHOOL   OF    MINKS.  ]/ 

97  Elinore   vacuum   flotation   process. 
Minr.  Ind.  v.  16,  p.  974-976.     1907.     Illus. 

98  Elmore  vacuum   oil   process   in   Cornwall. 
Minr.  Ind.  v.  16,  p.  997.     1907. 

99  Gillies'    process. 

N.  S.  W.  Mines  Dept.     1907.     p.  41. 

lOu  Gopner,  C..    Uber  den  "Flotation-Prozesz." 

Metallurgie.  v.  4,  p.  522-530.     Ag.  8,  '07.     Illus. 

101  Haglund,  G.     Theories  concerning  the  flotation  process. 
Eng.  &  Min.  Jour.    v.  83,  p.  344.     F.  16,  '07. 

102  Ingalls,   Walter   Renton.     Concentration   upside    down.    A   new 
process   of  ore   separation   based  upon   a  previously  unemployed 
principle   of    physics.      Heavy    minerals    float,    light    ones    sink. 

Eng.  &  Min.  Jour.  v.  84,  p.  765-770.     O'.  26,  '07.     Illus. 

103  Progress  in  the  metallurgy  of  zinc. 
Ens.  &  Min.  Jour.  v.  83,  p.  20-21.     Ja.  5,  '07. 

104  Jackson,   F.   H.     Acid   flotation   processes   at   Broken   Hill. 
Min.  &  Sci,  Pr.  v.  94,  p.  728-730.     Je.  8,  '07.     Illus. 

105  Macquisten's  flotation  method. 
Minr.   Ind.  v.  16,   p.   997-999.     1907.     Illus. 

106  Prentiss,  F.  H.     The  Elmore  vacuum  flotation  process. 
Eng.  &  Min.  Jour.  v.  83,  p.  1205.     Je.  22,  '07. 

107  Vacuum  process  for  concentration  of  ores. 

Chem.  Metl.  &  Min.   Soc.   of  S.  Africa,     v.  7,  p.   421.     Je.   '07. 

108  Walker,  Edward.    The  Elmore  vacuum  flotation  process. 
Eng.  &  Min.  Jour.  v.  83,  p.  800.     Ap.  27,  '07.     Illus. 

109  The  Elmore  vacuum  process  at  Dolcoath.     The  com- 
plex tin-copper-tungsten  ores  of  Cornwall,  heretofore  treated  with 
difficulty,  are  now  successfully  separated. 

Eng.  &  Min.  Jour.  v.  84,  p.  1103-1106.     D.  14,  '07.     Illus. 

110  Novel  equipment  of  Tywarnhaile  copper  mine.     Dy- 
namos   driven    by   producer-gas   engines   furnish   power   and    the 
vacuum  process  serves  to  concentrate  the  low-grade  ore. 

Eng.  &  Min.  Jour.  v.  83,  p.  1037.     Je.  1,  '07.     Illus. 

1908. 

111  Claudet,  H.  H.     A  few  notes  on  the  Elmore  vacuum  process  of 
ore  concentration. 

Journ.  Can.  Min.  Inst.  v.  11,  p.  460-462.     1908. 

112  Concentration  and  separation.     Flotation  methods. 
Minr.   Res.  U.   S.   1908,   Pt   1,   p.   251-25b. 

Review  1908, 


18  .MISSOURI    SCHOOL   OF   MINKS. 

113  Concentration  problem  at  Dolcoath. 
Min.  &  Sci.  Pr.  v.  97,  p.  315-316.     S.  5,  '08. 

114  Debavay   Company. 

N.  S.  W.  Mines  Dept.  1908.     p.  38-39. 

115  Delprat,  G.   D.     Flotation   processes  at  Broken   Hill. 
Min.  &  Sci.  Pr.  v.  97,  p.  84.     Jl.  18,  '08. 

116  Financial  side  of  the  Elmore  process  at  Broken  Hill. 
Minr.  Ind.  v.  17,  p.  951-953.     1908. 

117  Flotation  processes  at  Broken  Hill. 
Min.  &  Sci.  Pr.  v.  96,  p.  494.    Ap.  11,  '08.    Illus. 

118  Golconda,   Nevada.     An    interesting   concentrator.      Gravity   not 
used. — Description  of  apparatus. — Excellent  results. 

Min.  &  Sci.  Pr.  v.     96,  p.  414.     Mr.  28,  '08. 

119  *Gopner,   C.     Elmore   process. 

Bulletin  de  L'Industrie  Minerale.     v.  8,  p.  789.     1908. 

120  Die  Eizkonzentration  nach   Elmore. 
.Metallurgie.     v.   5,  p.   1-7.     Ja  .8,   '08.     Illus.   p.   45-50.     Ja.   22,   '08; 

p.  288.     My.  22,   '08. 

121  Die  finanzielle  Seite  des  Elmore-Verfahrens  fur   die 
Broken  Hill  tailings. 

Metallurgie.    v.  5,  p.  609-611.     O.  22,  '08. 

122  Neuere  Mitteilungen  iiber  die  Gewinnung  von  Zink- 
konzentraten  aus  den  Broken  Hill  Tailings. 

Metallurige.  v.  5,  p.  128-130.     F.  22,  '08. 

123  Haywood,  Bryan.     The  Elmore  vacuum  process. 
West.  Chem.  &  Metl.     v.  4,  p.  100-104.     Mr.  '08.     Illus. 

124  Ingalls,  W.   R.     The   development  of  the  Delprat  and   Potter 
flotation  processes. 

Eng.  &  Min.  Jour.  v.  86,  p.   175.     Jl.   25,  '08. 

125  The  improved  Macquisten  tube. 
Eng.  &  Min.  Jour.  v.  86,  p.  23.    Jl.  4,  '08.     Illus. 

126  Linde,    R.    Das    Schwemmverfahren    zur    Erzanreicherung    von 
Elmore. 

Metallurgie.  v.  5,  p.  87-96.     F.  8,  '08.     Illus. 

127  Nicholas,  Francis  C.     A  novel  graphite  washing  plant. 
Min.  Wld.  v.  28,  p.  18.     Ja.  4,  '08. 

128  Ore  dressing. 

Electrochem.  &   Metl.  Indust.  v.   G,  p.  174.     My.  '08. 

129  Ore   dressing.     With  special  reference  to  oil  concentration. 
Electrochem.  &  Metal.  Indust.  v.  6,  p.  185-189.    My.  '08,..  Illus. 

130  Plummer,   John.     The   method   of  extracting  zinc  in  Australia. 
Min.  Wld.  v.  29,  p,  711-712.     N.  7,  '08.     Illus. 


MISSOURI    SCHOOL   OF    MINKS.  19 

131  Schwimmprozesso. 

Metallurgie.     v.  5,  p.  297-298.     My.  22,  '08. 

132  *Selwyn-Brown,  A.     Macquisten  flotation  process. 
Can.  Min.  Jour.     O.  15,  '08. 

133  Storen,  R.     Method  of  drying  oil  concentrates. 
Eng.  &  Min.  Jour.  v.  85,  p.  1151.    Je.  6,  '08. 

134  Ore    dressing    by   adhesion    of   liquid    films.      Princi- 
ples  of  Elmore   process   and   other   systems   based  upon   surface 
tension  and  the  property  of  minerals  to  attract  or  repel  different 
liquids. 

Eng.  &  Min.  Jour.   v.  86,  p.  839-842.    O.  31,  '08. 

135  Sulman,  H.  L.    A  method  of  settling  slime.     Discussion. 
Inst.  Min.  &  Metl.  Bulletin  No.  42.    Mr.  12,  '08. 

136  Swart,  W.  G.     Present  status  of  art  of  ore  dressing. 
West.  Chem.  &  Metl.  v.  4,  p.  69-76.     Mr.  '08. 

137  Zinc  Corporation. — The  Elmore  process. 
Min.  &  Sci.  Pr.  v.  96,  p.  280.     F.  29,  '08.     Map. 

1909. 

138  Amalgamated  Zinc   (Debavay's). 
Min.  Mag.  v.  1,  p.  239.     N.  '09. 

139  Amalgamated  Zinc  (Debavay's),  Ltd. 
Min.  Jour.  v.  87,  p.  182.     O.  30,  '09. 

140  ^Barclay,  A.     Elmore  process. 

Journal    of    the    British    Federated    Society    of    Mining    Students, 
v.  2,  p.  153.    Je.  '09.    Illus. 

141  Bennett,  W.  E.     Ore  reduction  at  the  Telemarken  Copper  Mine, 
Norway. 

Min.  Jour.  v.  85,  p.  335-336.     Mr.  13,  '09.     Illus. 

142  Broken  Hill  slime. 

Min.  Mag.  v.  1.,  p.  261.     D.  '09. 

143  Caucasus  Copper  Co.,  Ltd.     (Murgne  Gorge,  district  of  Artvin, 
Government  of  Kutais,  near  Dzansul,  Caucasus,  Russia.) 

Min.  Jour.  v.  87,  p.  111-112.     O.  16,  '09. 

144  *Clark,  Donald.    Horwood  process  for  sulphide  ores. 
Aust.  Min.  Stand,   v.  42,  p.  498,  519.     1909.     Illus. 

145  Debavay  flotation  process. 

Min.  &  Sci.  Pr.  v.  99,  p.  725.     N.  27,  '09. 

146  *Descroix,   L.     The   Elmore   vacuum   process   of   mineral   con- 
centration and  its  results. 

Revue  de  Metallurgie.  v.  6,  p.  1060.     1909.     Illus. 


20  MISSni'Kl    SfllOdl.    OF    MINKS. 

147  Elniore,  A.   Stanley.     Elmore   vacuum   process   applied   to   puri- 
fication of  tin  ore  and   tin  concentrates   in   England,   Straits  Set- 
tlements,   and    South    Africa. 

Mill.  Jour.    v.  86,  p.  267-268.     Ag.  28,  'n!». 

148  Elmore    vacuum    process    at    Broken    Hill,    New    South 
Wales. 

Min.  Jour.  v.  85,  p.  234-236.     F.  20,  '09.     Illus. 

149  Notes  on  various  applications  of  the  Elmore  vacuum 
process. 

Eng.  &  Min.  Jour.  v.  87,  p.  1275-127G.    Je.  26,  '09. 

150  Elmore  vacuum   plant. 

Min.  &  Sci.  Pr.  v.  98,  p.  391-392.     Mr.  13,  '09.     Illus. 

151  The  history  of  the  flotation  processes. 
Min.  Mag.  v.   1,  p.   61-64.     S.   '09.     Illus. 

152  Hoover,   H.    C.      Elmore   process   as   applied   by   Zinc   Corpora- 
tion.    Present  earnings  about   £6000  per  month;   large  supply  of 
material  for  future  treatment;   description  of  works  and  method 
of  treatment.     Treatment  cost  5/7. 08d  per  ton. 

Eng.  &  Min.  Jour.  v.  88,  p.  205-207.    Jl.  31,  '09.    Illus. 

153  The  Horwood  process. 

Min.  Jour.  v.  87,  p.  410.     D.  11,  '09. 

154  Kendall  separator. 

Min.  Wld.  v.  30,  p.  634.     Ap.  3,  '09. 

155  Levy,  Ernest.     Murex  magnetic  process. 
Min.  &   Sci.   Pr.  v.   99,  p.  777-778.     D.   4,  '09. 

156  Linde,  R.    Die  Elmoresche  Schwemmanlage  zur  Erzanreicherung 
in  Brokenhill,  Australien. 

Metallurgie.    v.  6,  p.  486-490.    Ag.  8,  '09.     Illus. 

157  Murex  magnetic  concentration  process. 
Min.  &  Sci.  Pr.    v.  98,  p.  757.     My.  29,  '09. 
Eng.  &  Min.  Jour.     v.  88,  p.  371.     Ag.  21,  '09. 

158  The   Murex  magnetic   process.     The   concentration  of  ores   by 
a  wet  method. 

Min.  Jour.     v.  85,  p.  565.     My.  1,  '09.     Illus. 

159  Nichols,  Horace  G.     Treatment  of  slime. 
Min.  Mag.  v.  1,  p.  221-224.     N.  '09.     Illus. 

I  HO  Ore  Concentration  Co.     (1905),  Ltd.     (Broken  Hill  processes.) 

Min.  Jour.  v.  86,  p.  41.     Jl.  3,  '09. 

161  Pegg,  Arthur  J.     The  Murex  magnetic  process. 
Min.  Jour.    v.  85,  p.  591.     My.  8,  '09. 

162  Plummer,  John.     The  Broken  Hill  Sulphide  Corporation. 
Min.  Wld.  v.  31,  p.  420-421.     Ag.  21,  '09.     Illus. 


MISSOURI   SCIIOOI,  OF  MINIMS.  21 

163  *Poole,  W.     Treatment  of  Broken  Hill  ores. 
Queensland  Govt.  Mining  Jour.     Ja.  15,  F.  15,  Mr.  15,  '09. 

164  The  Sanders  flotation  process. 

Eng.  &  Min.  Jour.    v.  87,  p.  844.     Ap.  24,  '09.     Illus. 

165  Selwyn-Brown.  A.     Macquisten  process  of  flotation. 
Chem.  Metl.  &  Min.  Soc.  of  S.  Africa,    v.  9,  p.  411.    My.  '09. 

166  Sewell,    Francis    W.      Concentration    of    ores    by    the    flotation 
process. 

Mex.  Min.  Jour.    v.  8,  p.   18-21.     Mr.  '09.     Illus. 

167  Stocker,  J.     The  Elmore  process  at  Cobar. 
Eng.  &  Min.  Jour.    v.  87,  p.  177.     Ja.  16,  '09. 

168  -   Vacuum  oil  process  in  the  Cobar  Gold  Mine. 
Min.  Jour.    v.  85,  p.  281.     F.  27,  '09.. 

169  Walker,  Edward.     The  history  of  the  flotation  processes. 
West.  Chem,  &  Metl.     v.  5,  p.  469-475.     D.  '09. 

170  Zinc  mining  in  foreign  countries. 

Minr.  Ind.    v.  17,  p.  856-864.     1908;  v.  18,  p.  713-723.     1909. 

1910. 

171  Amalgamated  Zinc   (Debavay's). 
Min.  Mag.    v.  3,  p.  139-140.     Ag.  '10. 

172  Carthew,  J.  and  Sawyer,  B.     Joint  report. 

N.  S.  W.  Mines  Dept.  1909.   p.  95-106;  191  Orp.  86;  1911,  p.  94. 

173  Clark,  Donald.     Horwood  process  for  separating  zinc  sulphides. 
Blende  separated  from  other  minerals  by  a  combination  of  par- 
tial roasting  and  oil  flotation:     Successful  separation  of  intimate 
mixtures. 

Eng.  &  Min.  Jour.    v.  89,  p.  460-461.     F.  26,  '10.     Illus. 

174  Treatment  of  complex  sulphides. 
Min.  Mag.    v.  2,  p.  56-58.     Ja.  '10.     Illus. 

175  Concentration  and  separation.     Flotation  methods. 
Minr.  Res.  U.  S.  1910,  Pt.  1,  p.  278-279. 

Review  1910. 

176  The  Debavay  mill. 

Min.  Jour.   v.  89,  p.  551-552.     Ap.  30,  '10. 

177  Flotation  of  zinc  ores. 

Metl.  &  Chem.  Engng.    v.  8,  p.  205.    Ap.  '10. 

178  Flotation  process  at  Broken  Hill. 
Min.  &  Sci.  Pr.    v.  101,  p.  583.     O.  29,  '10. 

179  Flotation  process  for  the  concentration  of  tin  ores. 
Metl.  &  Chem.  Engng.  v.  8,  p.  204,    Ap.  '10. 


) ) 


MISSOURI    SCHOOL    OK    MINKS. 


180  Flotation  processes.— Sulphide  Corporation — Sulitjelma  Copper. 
Min.  &  Sri.  Pr.  v.  Kill.  p.  SiiC.     My.  2S,  '10. 

181  Flotation     processes.       Vacuum     concentration     at     Sulitjelma, 
Norway. 

Minr.  Ind.  v.  19,  p.  762-7G4.     1910. 

182  Flotation.      The    Amalgamated    Zinc    (Debavay's)    new    mill    at 
Broken  Hill. 

Min.  Mas.  v.  2,  p.  34S-349.     My.  '10. 

is:;  Holmsen,   Holm  &  Rees,   H.  N.     Vacuum-concentration  at  Suli- 

telma. 
Min.  Mag.  v.  2,  p.  :!77-:!80.     My.  '10.     Illus. 

IS  I  -Hoover,  T.  ^.     Oil  liotation  at  Broken  Hill. 

Aus).  Min.  Stand,  v.  44,  p.  63.     1910. 

isr>  Oil  flotation  process  at  Broken  Hill,  N.  S.  W.     Zinc 

and  lead  sulphides  are  collected  in  a  froth  and  floated  off;  high- 
est recovery  is  made  from  slime.    Total  cost,  $1.84  per  ton. 
Eng.  &  Min.  Jour.  v.  89,  p.  913-917.     Ap.  30,  '10.     Illus. 

186  -    Smelting  briquetted  zinc  ore. 
Eng.  &  Min.  Jour.  v.  90,  p.  323-321.     Ag.  13,  '10. 

187  Hoover  flotation  apparatus. 

Eng.  &  Min.  Jour.  v.  90,  p.  123.     Jl.  16,  '10.     Illus. 

188  Horwood's  process  for  the  separation  of  zinc  blende  from  other 
sulphides. 

Min.  Jour.  v.  88,  p.  342.     Mr.  19,  '10. 

189  Interesting  magnetic-concentration  process. 
Min.  &  Sci.  Pr.  v.  101,  p.  646.     N.  12,  '10. 

190  McDermott,   Walter.     The  elements  of  slime  concentration. 
Trans.  Instn.  Min.  &  Metl.     v.  19,  p.  400-431.     Ap.  21,  '10. 

191  The  Macquisten  concentrating  process. 

Eng.  &  Min.  Jour.  v.  89,  p.  659.     Mr.  26,  '10.     Illus. 

192  The  Murex  magnetic  process. 
Min.  Mag.  v.  1,  p.  142-143.     O.  '09. 

Kng.  &  Min.  Jour.  v.  89,  p.  l.~>7.     Ja.  lf>,  '10. 

193  The  new  Potter  process. 
Min.  Mag.  v.  2,  p.  205.     Mr.  '10. 

194  Oil  processes. 

Min.  Mag.  v.  2,  p.  337-338.     My.  '10. 

195  Plummer,  John.    Ore  treatment  at  Broken  Hill. 
Min.  Wld.     v.  33,  p.  458.     S.  10,  '10. 

196  Potter   process. 

Eng.  &  Min.  Jour.  v.  81,  p.  1000.  My.  26,  '06. 
N.  S.  W.  Mines  Dept.  1903.  p.  42;  1907,  p.  41. 
Metl.  &  Chem.  Engng.  v.  8,  p.  498-499.  Ag.  '10. 


MISSOURI   SCHOOL  OF  MINES.  23 

197  Simpson,  W.  E.     Oil  in  the  Potter  process. 
Min.  Mag.  v.  2,  p.  434-436.    Je.  '10. 

198  Simpson,  W.  E.    Oil  in  the  Potter  (ore-flotation)  process. 
Jour.  Soc.  Chem.  Indust.  v.  29,  p.  823-824.     Jl.  15,  '10. 

199  Use  of  acid  in  flotation  processes. 
Min.  Wld.  v.  32,  p.  712.    Ap.  2,  '10. 

200  Zinc  at  Broken  Hill. 

Min.  Mag.  v.  3,  p.  330-332.     N.  '10. 

201  Zinc  metallurgy. 

Min.  Mag.  v.  2,  p.  8-9.     Ja.  '10. 

1911. 

202  Amalgamated  Zinc    (Debavay's).' 
Aust.  Min.  Stand,  v.  46,  p.  56.     Jl.  20,  '11. 

203  Bastin,  E.  S.     Graphite  deposits,  mining,  and  milling,  Alabama. 
Min.  &  Eng.  Wld.    v.  35,  p.  157-158.    Jl.  22,  '11.     Illus. 

204  British  Broken  Hill  Proprietary  Co.,  Ltd. 
Min.  Jour.  v.  93,  p.  488.     My.  6,  '11. 

205  Broken  Hill. 

Min.  Mag.  v.  5,  p.  274-276.     O.  '11.     Illus. 

206  Broken    Hill    prospects. — Block    10    ore. — British    zinc    flotation 
plant. 

Aust.  Min.  Stand,  v.  45,  p.  244.     Mr.  8,  '11. 

207  Broken  Hill  prospects.     Clarke's  slime  treatment  process. 
Aust.  Min.  Stand,  v.  45,  p.  218-219.    Mr.  1,  '11. 

208  Broken  Hill  prospects.     Flotation  at  the  Junction  North. — Junc- 
tion and  Junction  North  Amalgamation. 

Aust.  Min.  Stand,  v.  45,  p.  340.     Ap.  5,  '11. 

209  Broken  Hill  prospects. — Murex  process. 
Aust.  Min.  Stand,  v.  45,  p.  116.     F.  1,  '11. 

210  Broken  Hill  prospects. — Tailings  treatment. 
Aust.  Min.   Stand,     v.   45,  p.  159.     F.  15,  '11. 

211  Broken  Hill  prospects.     Zinc  Corporation's  profits. 
Aust.  Min.  Stand,  v.  45,  p.  365-366.     Ap.  12,  '11. 

212  Concentration  and  separation  . 
Minr.  Res.  U.  S.  1911,  Pt.  1,  p.  371-372. 
Progress  1911. 

213  Crocker,  J.     Flotation  at  Zinc  Corporation. 
Eng.  &  Min.  Jour.  v.  92,  p.  1259.     D.  30,  '11. 

214  *Donaldson,  R.  J.     Central  mine  plant. 
Min.  &  Eng.  Rev.  Ag.  and  S.  '11,  p.  771. 


J4  M  ISSUTKI    SCHOOL    "I-    M  INKS. 

215  The  economic  importance  of  the  lead-zinc  ore  deposits  of  the 
world. 

Min.  Jour.  v.  94,  p.  865-866.    Ag.  26,  '11. 

216  *Elmore,  A.  S.     Elmore  vacuum  oil  process  at  Broken  Hill. 
Gliickauf.     v.  45,  p.  846. 

217  Eucalyptus  oil. 

Min.  Jour.  v.  94,  p.  931.     S.  23,  '11. 

218  Eucalyptus  oil  and  mineral  flotation. 
Aust.  Min.  Stand,  v.  46,  p.  167.     Ag.  17,  '11. 

219  EucalyDtus  oil  for  mineral  flotation. 
Min.  &  Sci.  Pr.  v.  103,  p.  556.     O.  28,  '11. 

220  flotation  process  in  Idaho. 

Metl.  &  Chem.  Engng.  v.  9,  p.  567.     N.  '11. 

221  dotation  processes.     Experiments  on  mineral  flotation. 
Minr.  Ind.  v.  20,  p.  <s:;i-s:!7.    1911. 

222  Guess,  H.  A.     Progress  in  ore  dressing  in  United   States   and 
Mexico  during  1910.     Water  concentration. 

Metl.  &  Chem.  Engng.  v.  9,  p.  36-38.     Ja.  '11. 

223  Ingalls,  W.  R.     The  problem  of  mixed  sulphide  ores. 
Aust.  Min.  Stand,  v.  46,  p.  522-523.     N.  23,  '11. 

224  Macquisten  tube  concentrator  . 

Salt  Lake  Min.  Rev.  v.  13,  p.  24.     My.  30,  '11. 

225  Macquisten  tubes  in  Idaho. 

Metl.  &  Chem.  Engng.  v.  9,  p.  236.     My.  '11. 
Min.  &  Sci.  Pr.  v.  102,  p.  693-694.     My.  20,  '11. 

226  Mickle,  Kenneth  A.    Experiments  on  mineral  flotation. 
Eng.  &  Min.  Jour.  v.  92,  p.  307-310.    Ag.  12,  '11. 

Abstracted    from    Proceedings    of   the    Royal    Society    of   Victoria, 
v.  XXIII  (N.  S.),  Pt.  2,  March,  1911. 

227  Mickle,  K.  A.     Experiments  on  mineral  flotation.     Flotation  in 
water. — Cold  water. 

Metl.  &  Min.  Soc.  of  S.  Africa,     v.  12,  p.  136-141.     O.  '11. 

228  Minerals  Separation,  Ltd. 

Min.  Jour.  v.  87,  p.  317-320.     N.  20,  '09;    v.  91,  p.  1535-1538.     D.  31, 

'10;  v.  95,  p.  1299-1303.     D.  30,  '11;   v.  97,  p.  361.     Ap.  13,  '12. 
N.  S.  W.  Mines  Dept.    1908.    p.  38-39. 
Aust.  Min.  Stand,  v.  45,  p.  142.     F.  8,  '11. 

229  Mining  in  New  South  Wales.     Broken  Hill. 
Aust.  Min.  Stand,  v.  46,  p.  363.     O.  12,  '11. 

230  Mining    in    Western    Australia^     Coolgardie    Field.— Hill's    Pro- 
prietary.— Large  flotation. 

Aust.  Min.  Stand,   v.  45,v  p.  186.    F.  22,  '11. 


MISSOURI   SCHOOL  OF  MINKS.  25 

231  Mitchell,  D.  P.     Flotation  at  Zinc  Corporation,  Ltd. 
Eng.  &  Min.  Jour.  v.  92,  p.  994-997.     N.  19,  '11.     Illus. 

232  *Moldenhauer,   Max.     Comparison   and   history   of   Elmore   and 
other  flotation  processes. 

Oesterreichesche  f.  B.  u.  H.     S.  16,  '11.     p.  513. 

233  Murex  process  at  Broken  Hill. 

Min.  &  Sci.  Pr.  v.  103,  p.  177.     Ag.  5,  '11. 

234  *Newton,  P.  M.     Flotation  process  and  patents. 
Min.  &  Eng.  Rev.  v.  3,  p.  211;  233.     1911. 

235  *Newton,  P.  M.     Sequence  of  patents. 
Austral.  Min.  &  Eng.  Rev.     F.  6,  '11. 

236  Nutter,  Edward  H.    The  flotation  processes. 
Eng.  &  Min.  Jour.  v.  91,  p.  946.     My.  13,  '11. 

237  Ore  Concentration  Co. 

Aust.  Min.  Stand,  v.  45,  p.  416.     Ap.  27,  '11. 

238  Poole,  W.     Treatment  of  Broken  Hill  ores.     Methods  of  grind- 
ing.    Concentrating   by   the   magnetic,    the   ffotation   and   the   oil 
processes. 

Mines  &  Min.     v.  32,  p.  227-233.     N.  '11.     Illus. 

239  Scott,  W.  A.     Tube  concentrator  in  the  Coeur  d'Alene. 
Min.  &  Sci.  Pr.    v.  103,  p.  809.     D.  23,  '11. 

240  Siebenthal,  C.  E.     Some  new  phases  of  zinc  metallurgy. 
Min.  Sci.    v.  64,  p.  518-519.     D.  7,  '11. 

241  Sulman,  H.  Livingstone.     Modern  zinc  problems. 

•     Min.  &  Sci.  Pr.    v.  102,  p.  518-520.     Ap.  15,  '11;   583-587.     Ap.  29,  '11. 
Metl.  &  Chem.  Engng.    v.  9,  p.  323-324.     Je.  '11.     Illus. 

242  Presidential  address. 

Trans.  Instn.  Min.  &  Metl.   v.  20,  p.  35-66.     Mr.  22,  '11. 

243  Sulphide  Corporation,  Ltd. 

Min.  Jour.    v.  91,  p.  1493-1494.     D.  24,  '10. 
Min.  Mag.    v.  4,  p.  202.     Mr.  '11. 

244  "Treatment  of  mixed  sulphides  by  the  Horwood  pro'cess. 
Aust.  Inst.  of  Min.  Engr.  Proc.     Je.  30,  '11. 

245  Walker,  Edward.     Zinc  production  in  Australia. 
Min.  &  Sci.  Pr.    v.  302,  p.  15-17.     Ja.  7,  '11.     Illus. 

246  Walker,  T.  L.     Molybdenum  ores;   occurrence  and  uses. 
Min.  &  Eng.  Wld.     v.  35,  p.  1277-1279.     D.  23,  '11. 

247  Wittich,  L.  L.     Magnetic  ore  separation. 
Mines  &  Meth.   v.  3,  p.  344-345.     O.  '11.    Illus. 

248  Woodbridge,  Dwight  E.     The  Orijarvi  Mine,  Finland. 
Eng.  &  Min.  Jour.    v.  91,  p.  759-760.     Ap.  15,  '11.     Illus. 


26  MISSOURI    SCHOOL    I)!'    MINKS. 

249  Zinc  Corporation. 

Min.   &    Sci.   Pr.    v.   95,  p.  222-223.     Ag.   24,   '07;    v.   97,  p.  232.     Ag. 

15,   '08. 

X.  S.  W.  Mines  Dept.    190S.     p.  38-39. 

Kn.u.  &  Min.  Jour.    v.  87,  p.  219.    Ja.  23,  '09;  v.  97,  p.  C14.    Mr.  21,  '14. 
Min.  Mag.    v.  2,  p.  467-468.     Je.  '10.     Illus. 
Min.  Jour.    v.  85,  p.  688-689.     My.  29,  '09;   v.  93,  p.  326.     Ap.  1,  '11; 

p.  568-570.     My.  27,  '11. 

250  The  zinc  problem. 

Min.   Mag.    v.  4,  p.  258-260.     Ap.  '11. 

1912 

251  Amalgamated  Zinc   (Debavay's),  Ltd. 
Min.  «t   Sci.   I'r.    v.   I  it.",  p.  <H5.     N.  16,  '12. 

252  Ash  croft,   J.    \Y.     The   flotation   process   as   applied   to   the   con- 
centration of  copper  ore  at   the  Kyloe  Copper  Mine,  New   South 
Wales. 

Hull.  Instn.  Min.  &  Metl.  No.  97.     O.  10,  '12.     Illus. 

Trans.  Instn.  Min.  &  Metl.    v.  22,  p.  3-49.     O.  17,  '12.     Illus. 

An  abstract  of  this  paper  appears  in  Eng.  &  Min.  Jour.    v.  94,  p. 

1085-1088.     D.  7,  '12.     Illus. 

Discussion.     Bull.  Instn.  Min.  &  Metl.  No.  98.     N.  14,  '12.     Illus. 
Adjourned  discussion.     Bull.  Instn.  Min.  &  Metl.  No.  100.     Ja.  9,  '13. 

253  The    flotation    process    at    the    Kyloe    Copper    Mine, 

N.  S.  W. 
Min.  Jour.    v.  99,  p.  1082-1084.     N.  2,  '12. 

254  Flotation  process  at  Kyloe,  New  South  Wales. 
Can.  Min.  Jour.    v.  33,  p.  797.     D.  1,  '12.     Illus. 

255  Copper  ore  treatment  by  flotation  process. 
Mines  &  Meth.    v.  4,  p.  91-96.     D.  '12.     Illus. 

256  The  Hraden  Copper  Co. 

Min.  &  Sci.  Pr.    v.  105,  p.  408.     S.  28,  '12. 

257  Concentration  by  flotation. 

Min.  &  Sci.  Pr.    v.  96,  p.  773.     Je.  6,  '08;   v.  106,  p.  246.     F.  8,  '13. 
Metl.  &  Chem.  Engng.    v.  10,  p.  191-192.     Ap.  '12. 

258  Concentration  of  carnotite  by  wet  and  dry  methods. 
Metl.  &  Chem.  Engn.    v.  12,  p.  89-91.     F.  '12. 

259  Concentration  of  molybdenite  ores  in  Australia. 
Min.  &  Engng.  Wld.    v.  37,  p.  815.     N.  2,  '12.     Illus. 
Abstract  from  the  Mining  and  Engineering  Review. 

2GO  Concentration.      Progress    of     flotation     concentration    in    the 

United  States. 

Minr.  Res.  U.  S.  1912,  Pt.  1,  p.  392-394. 
Review  1912. 


.MISSOURI    SCHOOL    OF    MINKS.  27 

261  The  Debavay  process. 

Eng.  &  Min.  Jour.    v.  82,  p.  344-346.     Ag.  25,  '06.     Illus.;   p.  1115.     D. 

15,  '06. 

N.  S.  W.  Mines  Dept.  1907.    p.  41. 
Min.  Mag.  v.  7,  p.  455.     D.  '12.     Illus. 

262  *Dreibrodt,  O.    Neuer  Apparat  zur  Trennimg  der  Mineralien  von 
Salzgesteinen  mit  schweren  Flussigkeiten. 

Kali,  Jl.  1,  '12.     p.  314.     Illus. 

Separation  of  saline  minerals  by  flotation  in  heavy  liquids;   chiefly 
in  chemical  analysis. 

263  Durell,  C.  T.     Flotation  of  zinc  ores. 
Colo.  Sch.  Mines  Mag.    v.  2,  p.  199-200.     Je.  '12. 

264  *E.  P.    Die  Redeutung  des  Masuts  fur  die  Erzaufbereit. 
Petroleum,  My.  1,  '12,  p.  831. 

The  significance  of  the  Elmore  oil  flotation  process  with  regard  to 
the  utilization  of  masut  and  oil  refinery  wastes. 

265  The  evolution  of  ore  flotation. 

Eng.  &  Min.  Jour.    v.  94,  p.  500.     S.  14,  '12. 

266  Flotation  at  Butte  and  Superior. 

Metl.  &  Chem.  Engng.    v.  10,  p.  426.     Jl.   '12. 

267  The  froth  flotation  process. 

Eng.  &  Min.  Jour.     v.  94,  p.  1071-1072.     D.  7,  '12. 

268  *Herwegen,   Leo.     Die    Schwimmverfahren,   ihre    Entwickelung 
und  Bedeutung"  fur  die  Erzaufbereitung. 

Gluckauf,  Jl.  27,  '12,  p.  1185-1194.     Ag.  3,  '12,  p.  1231-1242.     Illus. 
The  flotation  processes,  development  and  significance  in  ore  dress- 
ing. 
English  abstract.     Min.  Jour.    v.  98,  p.  806.     Ag.  10,  '12. 

269  Ueber  die  Bedeutung  der  Flotationstechnik. 
Montanist  Rundschau,  S.  15,  '12,  p.  965. 

The  significance  of  flotation  methods  with  special  reference  to  Aus- 
trian ores;   read  to  Bergmannstag,  Vienna,  S.  '12;  abstract. 

270  Hofstrand,  O.  B.    The  Macquisten-tube  flotation  process. 
Trans.  Am.  Inst.  Min.  Engrs.    v.  43,  p.  692-697.     My.  '12. 
Bull.  Am.  Inst.  Min.  Engrs.    Ja.  '13.     p    73-77.     Illus. 

271  *Holtmann,    -  Das    Schwimmaufbereitungsverfahren    der 
Grube  Friedrichssegen  nach  System  Leuschner. 

Gluckauf,  Mr.  9,  '12,  p.  388-393.    Illus. 

The   Leuschner   oil-flotation  process   at  the   Friedrichssegen   Mines 

on    the    Lahn,    Germany;     chiefly    for    chalcopyrite,    blende    and 

galena. 
English  abstract  in  Min.  Jour.  v.  97,  p.  402.     Ap.  20,  '12, 

272  *Hoover,  T.  J.    Zinc  corporation. 
Min.  &  Eng.  Rev.     Ag.  '12.     p.  410. 


28  MISSOURI     SCUOU!.    OL-     MINKS. 

273  '!  lie   Norwood  process  for  mixed  sulphides. 

Chem.  Engng.    v.  10.    p.  314.    My.  '12. 


i'T4  Hyde's  flotation  process. 

Min.   Mag.     v.   7,   p.    64     Jl.   '12.     Illus. 
Eng.  &  Min.  Jour.    v.  93,  p.  1068.    Je.  1,  '12. 

275  Inouye,  Tadashiro.     Flotation  of  zinc  ores  in  Japan. 
Min.  &  Sci.  Pr.     v.  104,  p.  892-893.     Je.  29,  '12. 

276  The  Leuschner  flotation  process. 

Eng.   &  Min.   Jour.     v.   93,  p.   924.  My.   11,   '12.     v.   94,   p.    581-582, 

S.  28,  '12.     Illus. 

Min.  &  Engng.  Wld.     v.  37,  p.  480.  S.  14,  '12. 

Min.  Mag.  v.  6,  p.  377-378.     My.  '12.  Illus. 

277  The  Leuschner  flotation  process  for  the  reduction  of  sulphide 
ores. 

Min.  Jour.  v.  97,  p.  402.     Ap.  20,   '12. 

278  McClave,  James    M.     Recent  developments    in   zinc   ore   dress- 
ing.    Progress   made  in   inventions   bearing  on  the   problems   of 
grinding,  sizing,  and  separation  according  to  various  principles. 

Advance  of  flotation  methods. 

Min.  Sci.  v.   65,  p.   90-91.     Ja.   25,  '12. 

279  The  Macquisten  tube. 
Min.  Mag.  v.  6,  p.  32-33.     Ja.  '12. 

280  Macquisten   tube   mill. 

Mines  &  Meth.  v.  3,  p.  406.     F.   '12. 

281  Metallurgy  of  molybdenum. 

AIH1.  &  Chem.  Engng.  v.  10,  p.  110-111.     F.  '12. 

282  *Meuskens,  Cl.    Das  Schwimmverfahren  der  Mineral  Separation 
Ltd. 

Techn.  Blatter.     S.  21,  '12.     p.  297.     Illus. 

Flotation    process    of    Minerals    Separation,    Ltd.    for    copper,    zinc, 
molybdenum  and  silver-gold  ores. 

283  fickle,  Kenneth  A.     Flotation  of  minerals. 

Atist.  Min.  Stand,  v.  45,  p.  343.     Ap.  5,  '11;   p.  368-369.     Ap.  12,  '11; 

p.    394-396.     Ap.   20,   '11;    p.    416.     Ap.    27,   '11.     v.    47,   p.   333.     Ap. 

11,    '12;    p.    357.     Ap.    18,   '12;    p.    381-382.     Ap.    25,    '12;    p.   403-404. 

My.  2,  '12. 

Eng.  &  Min.  Jour.  v.  94,  p.  71-76.     Jl.  13,  '12. 

Metl.  &  Chem.  Engng.  v.  9,  p.  426-427.     Ag.  '11. 

284  Flotation  of  minerals. 

Min.  &  Sci.  Pr.  v.  105,  p.  12-14.     Jl.  6,  '12.    Illus. 

Abstract  from  a  paper  read  before  the   Royal  Society   of  Victoria 
and  reported  in   the  Australian   Mining  Standard. 


MISSOURI    SC1IOOI,    OF    MINKS.  29 

285  Flotation  of  minerals. 

*Roy.  Soc.  of  Victoria,  v.  23,  p.  555-585.  Mr.  '11;  v.  24,  p.  301-330. 
Mr.  '12.  Illus. 

Reprinted  in  Aust.  Min.  Stand.  Ap.  11,  '12,  p.  333;  Ap.  18,  '12,  p. 
357;  Ap.  25,  '12,  p.  381;  My.  2,  '12,  p.  403.  Illus. 

Special  reference  to  tests  on  Broken  Hill,  N.  S.  W.  ores  and  con- 
centrates. 

286  Minerals    Separation   and    Debavay    processes.      Australia    Pro- 
prietary, Limited. 

Min.  Jour.  v.   98,  p.   821.     Ag.  17,  '12. 

287  Mining  in  the  Coeur  d'Alene. 

Eng.   &    Min.   Jour.   v.    93,   p.   16.     Ja.    6,   '12. 

288  Moldenhauer,    Max.      Das    Filter    bei    der    Aufbereitung    feiner 
sulfidischer  Sande  und  Schlamme. 

Metallurgie.  v.  9,  p.  99-102.     F.  8,  '12.  '  Illus. 

289  Die  Methoden  der  schwimmverfahren  in  der  Erzauf- 
bereitung. 

Metellurgie.  v.  9,  p.  72-80.    Ja.  22,  '12.    Illus. 
Review  of  flotation  methods  in  ore  dressing. 

290  Murex  Magnetic  Co.,  Ltd. 

Min.  Jour.  v.  86,  p.  128-131.     Jl.  24,  '09;   v.  87,  p.  424.     D.  11,  '09; 

v.  91,  p.  1241-1243.     O.  22,  '10;   v.  93,  p.  336.     Ap.  1,  '11;   v.  94,  p. 

880.     S.  2,  '11. 

Min.  Mag.  v.  9,  p.  17-19,    Jl.  '13. 
Min.  &  Sci.  Pr.  v.  104,  p.  393.     Mr.  9,  '12. 

291  Murex  process. 

Min.  &  Sci.  Pr.  v.  98,  p.  775.     Je  5,  '09. 

*Aust.  Min.  Stand,  v.  42,  p.  309.     1909;   v.  45,  p.  284.     Mr.  22,  '11. 

Min.  Mag.  v.  1,  p.  220.     N.  '09. 

Eng.   &  Min.  Jour.  v.  94,  p.  1074.     D.  7,  '12. 

292  The  Murex  process  at  Cordoba. 

Min.  &  Sci.  Pr.  v.  104,  p.  466.     Mr.  30,  '12.. 

293  Notes  on  the  Elmore  process. 

Mex.   Min.  Jour.  v.  14,  p.  23-24.     My.  '12.     Illus. 

294  Oil  flotation  plant  of  the  Butte  and  Superior. 
Min.  &  Sci.  Pr.  v.  104,  p.  706.     My.  18,  '12. 

295  Oil  flotation  process. — Elmore  annual  report. — Minerals  Separa- 
tion   statement. — Results    with    the    Murex    magnetic    process.- — 
The  Cordoba  Copper  Mine. 

Min.  &  Sci.  Pr.  v.  104,  p.  350-351.     Mr.  2,  '12.     Illus. 

296  Ore  concentration. 

Min  Mag.  v.  6,  p.  78.     Ja.  '12. 

297  Parmelee,   H.   C.     Concentration  by  flotation  of  dry.  ore  pulp, 
Metl.  &  Chem.  Engng.  v.  10,  p.  132-135.     Mr.  '12.     Illus. 


30  .MISXirui    SCHOOL,    OF    MINKS. 


2C8  Processes  and  publicity. 

Min   Mag.  v.  7,  p.  328-329.     N.   ?12. 

299  Frogress  of  the  zinc  industry. 

Min.  &  Sci.  Pr.  v.  104,  p.   587.     Ap.  27,  '12. 

300  Schneider,  George  W.    Concentration  at  the  Butte  Superior  Mill. 
Mines  &  Min.  v.  33,  p.  160.     O.  '12. 

301  ^Scholtze,    G.      Da^    Flotations-Schwimmverfahren    zum    Aufbe- 
reiten  armer  Erze  und  Schlamme. 

Kohle    &   Erz,   Ag.   5,   '12.   p.    803. 

Flotation  process  for  treating  low-grade  ores  and  slimes. 

302  Die   Schwimmverfahren,    ihre   Entwicklung   und   Beteutung   fur 
die  Erzaufbereitung. 

Metall  und  Erz.  v.  10  (N.  F.  I.),  p.  88-90.     N.  8,  '12.     Illus. 

303  Separation    of    zinc    and    lead   sulphides    in   slime   by   flotation 
processes. 

Min.  Mag.  v.  7,  p.  63-64.     Jl.  '12. 

304  ::  Shellshear,  W.     Slime  settlement. 

Proc.  Aust.  Inst.  Mg.  Engrs.     Supplement  No.  3.     D.  31,  '12.     Illus. 

oil.")  *  Smith,  H.  Hardy.    Minerals  Separations  flotation  plant  at  Kyloe 

Copper  Mines,  N.  L. 
Proc.  Aust.  Inst.  Mg.  Engrs.     New  Series  No.  7,  S.  3D,  '12.     Supple- 

ment No.  2,  S.  30,  '12.     Illus. 
Excerpt  in  Metl.  &  Chem.  Engng.  v.  11,  p.  131-136.     Mr.  '13.     Illus. 

306  Wood,    Henry    E.      Concentration   of  molybdenite    ores. 

Eng.  &  Min.  Jour.  v.  93,  p.  227-228.     Ja.  27,  '12.     Illus. 

:'.i»7  Separation  of  sulphides  by  water  flotation.     Descrip- 

tion of  the  Henry  E.  Wood  process.     Account  of  author's  expe- 
rience during  the  last  seventeen  years.     Report  upon  numerous 
observations. 
Min.  Sci.  v.  66,  p.  392-394.     D.  '12;    p.  412-433,  D.  26,  '12.     Illus. 


The  Wood  flotation  process. 


Bull.  Am.  Inst.  Min.  Engrs.     O.  '12.     p.  1227-1244.     Illus. 
Trans.  Am.  Inst.   Min.  Engrs.  v.   44,  p.   684-701.     1912.     Illus. 

1913 

309  Australasian  Institute  of  Mining  Engineers.     The  Broken  Hill 
Congress. 

Aust.  Min.  Stand,  v.  49,  p.  467-476.     Je.  5,  '13.     Illus. 

310  *Bousquet,  G.     Du  Flottage  des  Minerals. 
L'Echo  des  Mines,  Jl.  17,  '13,  p.  823. 

On  the  flotation  of  ores.     Abstract  from  Soc.  des  Ingenieurs  Civil. 

311  Procides   de  preparation   mechanique   des    minerals 
par   flottage. 

Bulletin  Societe  Ingenieurs  Civils  de  France.     Je.  '13.     Illus. 


MISSOURI    SCHOOL,   OF    MINES. 

312  Eullock,  Stanley  C.     Description  of  a  modern  lead  concentrat- 
ing mill,  Broken  Hill  Junction  North  Mine,  N.  S.  W. 

Bull.  Instn.  Min.  &  Metl.  No.  100.     Ja.  9,  '13.     Illus. 
Discussion.     Bui.     Instn.  Min.  &  Metl.  No.  101.     F.  13,  '13. 

313  The  Butte  and  Superior  concentrating  plant. 
Min.  &  Sci.  Pr.  v.  106,  p.  952-953.     Je.  21,  '13. 

314  Butte  and  Superior  Copper  Company,  Ltd. 
Min.  &  Sci.  Pr.  v.  106,  p.  926-927.     Je.  14,  '13. 

315  Campbell,  Donald  G.     A  study  of  ore  flotation. 
Sch.  Mines  Quar.     v.   35,  p.  28-34.     N.  '13. 

316  *Eddingfield,  F.  T.     Gogo  and  its  effect  on  gold  and  gold  solu- 
tions. 

Phil.  Jnl.  Sci.     Ap.  '13.  p.  135. 

Gogo   (plant)   juice  is  used  by  Philippine  natives  in  panning  gold- 
bearing  sands. 

317  Elmore  process. 

N.  S.  W.  Mines  Dept.     1907.    p.  41;  43. 

Mex.  Min.  Jour.  v.  17,  p.  432-434.     S.   '13.     Illus. 

318  Falkenberg,   Otto.     The  Murex  process  in  Germany. 
Min.  Jour.  v.  100,  p.  101-102.     Ja.   25,  '13. 

Abstract  from  the  Teknisk  Ukeblad. 

319  Fischer,  Siegfried.     The  carnotite  industry. 

Trans.  Am.,  Electroch.  Soc.  v.  24,  p.  361-375.     S.  11,  '13.     Illus. 

320  Flotation  and  copper  ores. 

Min.   &   Sci.   Pr.   v.   106,   p.   574-575.     Ap.  19,  '13. 

321  Flotation  at  Great  Cobar. 

Min.  &  Sci.  Pr.  v.  106,  p.  284.     F.  15,  '13. 

322  Flotation  methods. 

Min.  &  Sci.  Pr.  v.  106,  p.  96.     Ja.  11,  '13. 

323  Flotation  of  copper  sulphide  slime  in  Australia. 
Min.  Sci.  v.  67,  p.  203-205.     Ap.  '13.     Illus. 

324  Flotation   of  gold-copper  ore. 

Metl.  &  Chem.  Engng.  v.  11,  p.  484.     S.  '13. 

325  The  flotation  of  minerals. 

Chem.  Metl.   &  Min.   Soc.  of  S.  Africa,  v.  13,  p.  438-439.     Mr.  '13. 
Illus. 

326  Flotation  of  Minerals.    "Agitation  froth"  process. 
Metl.  &  Chem.  Engng.  v.  11,  p.  53.     Ja.  '13. 

327  Flotation  process  for  silver  ores. 

Min.  Jour.  v.  103,  p.  1081-1082.     N.  15,  '13.     Illus. 


32  MISSOURI  SCHOOL  OF  MINKS. 

328  Flotation  processes. 

Minr.  Ind.  v.  12,  p.  358-359.     1903.     v.   21,  p.  960-982.       1912.     Illus. 
Aust.  Min.  Stand,  v.  45,  p.  566.     Je.  8,  '11. 
Min.  Mag.  v.  4,  p.  332-333.     My.  '11;  v.  11,  p.  26-27.     Jl.  '14. 
Min.  &  Sci.  Pr.  v.  105,  p.  8!)4.     D.  21,  '12;   v.  106,  p.  55.     Ja.  4,  '13. 
Illus.     v.  107,  p.  175.     Ag.  2,  '13. 

329  Flotation  processes  at  Broken  Hill. 
Eng.  &  Min.  Jour.  v.  9G,  p.  583.     S.  27,  '13. 

330  Flotation   processes   of  ore   concentration. 

Min.  &  Metl.  Soc.  Amer.  Bulletin  67,  p.  312-323..     D.  31,  '13. 

331  Flotation  tests  at  Braden. 

Eng.  &  Min.  Jour.  v.  95,  p.  717.     Ap.  5,  '13. 

332  Flotation  vs.   Taljle  concentration  for  copper  ores. 
Eng.  &  Min.  Jour.  v.  !».".,   i>.   :',28.     F.  8,  '13. 

333  Gogo  juice  and  golJ. 

Eng.  &  Min.  Jour.  v.  96,  p.  516.     S.  13,  '13. 

334  Great  Cobar,  Ltd. 

Min.  Jour.  v.  100,  p.  30,     Ja.  4,  '13. 

335  Hayden,   Ralph.     Concentration   of   slimes   at  Anaconda,    Mont. 
Bull.  Am.  Inst.  Min.  Engrs.     Ag.  '13.     p.  1443-1467.     Illus. 
Discussion.     Ibid.     1913.     p.   2740-2741. 

336  1;  of  strand,  O.  B.     The  Macquisten  tube  flotation  process. 
Min.  &  Eng.  Wld.  v.  38j  p.  1191-1192.     Je.  21,  '13.     Illus. 

337  Hoover,  Theodore  J.     Zinc  production  at  Broken  Hill. 
Min.    Mag.   v.    8,   p.    47-48.     Ja.    '13. 

338  Huston,  George.     Some  ifs,  ands  and  buts  of  flotation. 
Min.    Sci.   v.   68,  p.   149-150.     S.   '13. 

339  Jaffe,    Richard.      Untersuchungen    uber    die    Moglichkeit    eines 
neuen  Aufbereitungprinzips  unter  Verwendung  von  Schaumen. 

Metall  und  Erz.     v.   10    (N.  F.  I.),  p.<  315-326.     Mr.   8,   '13;    p.   349- 
362.     Mr.  22,  '13.     Illus. 

340  .lames,  J.  C.  and  Farrier,  Val.     Joint  report. 

N.  S.  W.  Mines  Dept.     1912.     p.  85-91;   1913.  p.  91;    1914,  p.  89. 

341  .Vaequisten   tube   flotation  process. 

Metl.  &  Chem.  Engng.  v.  11,  p.  163.    Mr.  '13.     Illus. 

:M2  The   Macquisten  tubes. 

Knar.  &  Min.  Jour.  v.  95,  p.  183-184.     Ja.  18,  '13. 

343  Miller,  B.   L.     The  graphite  industry  of  Pennsylvania. 
Min.  &  Eng.  Wld.  v.  38,  p.  625-628.     Mr.  29,  '13.     Illus. 

344  Mineral   separation   by  froth. 
Min.  Jour.  v.  101,  p.  470.     My.  10,  13. 

345  Mineral  separation.     Use  of  eucalyptus  oil. 
Aust.  Min.  Stand,  v.  49,  p.  544.     Je.  26,  '13. 


MISSOURI    SCHOOL   OF    MIN#S.  33 

346  Minerals   Separation  notation  in  Colorado. 
Metl.  &  Chem.  Engng.  v.  11,  p.  605.    N.  '13. 

347  Minerals  Separation  plants  in  Chile  and  Sweden. 
Eng.  &  Min.  Jour.  v.  95,  p.  271.     F.  1,  '13. 

348  Minerals   Separation  process. 

Min.  Mag.  v.  2,  p.  463-464.     Je.  '10.     Illus.     v.  9,  p.  171-172.     S.  '13. 

349  Newman,  J.  Malcolm.    Broken  Hill  treatment  methods.     Recent 
developments.     Selective  flotation. 

Aust.  Min.  Stand,  v.  49,  p.  534-535.     Je.  26,  '13. 

350  -    Metallurgy  at  Broken  Hill. 

Min.  &  Sci.  Pr.  v.  107,  p.  307-308.     Ag.  23,  '13.     Illus. 

351  Notes  on  Broken  Hill  treatment  methods. 
Min.  &  Eng.  Wld.  v.  39,  p.  331-332.    Ag.  ,23,  '13. 

352  —    Zinc  and  lead.    Selective  flotation. 
Metl.  &,  Chem.  Engng.  v.  11,  p.  592-593.     O.  13. 

353  Oil  flotation. 

Min.  Mag.  v.  6,  p.  428.     Je.  '12;   v.  8,  p.  102-104.     F.  '13. 

354  Operations  of  Murex  Magnetic  Co.,  Ltd. 
Eng.  &  Min.  Jour.  v.  96,  p.  128.    Jl.  19,  '13. 

355  Ore  concentration  in  America. 

Aust.  Min.  Stand,  v.  50,  p.  362.     O.  30,  '13. 

356  *Preparation  de  Minerals  Mixtes  par  Voie  Humide. 
Echo  des  Mines.     My.  7,  '14,  p.  1913. 

Preparation  of  mixed  ores  in  a  wet  way. 

357  *Procedimiento  patentado  de  flotacion  de  minerales  metalicos 
del  ingeniero  de  Minas  J.  Menendez  Ormaza. 

Revista  Minera,  O.  '13,  p.  485. 

Patented  process  of  J.  Menendez  for  flotation  of  metallic  ores. 

358  *Procedimientos    de    Preparacion    Mecanica    de    Minerales    por 
Flotacion. 

Revista  Minera,  N.  16,  '13,  p.  549.     N.  24,  p.  561.     Illus. 
Mechanical  methods  for  preparation  of  ores  by  flotation. 

359  Processes. 

Min.  Mag.  v.  9,  p.  342.     N.  '13. 

360  Progress  of  Minerals  Separation  process. 
Eng.  &  Min.  Jour.  v.  96,  p.  108.     Jl.  19,  '13. 

361  *Putz,  O.    Der  gegenwartige  Stand  der  Aufbereitung  von  Zink 
und  Bleierzen  in  Oberschlesien. 

Zts.  Oberschles  Berg  und  Huttenmannisch.     Vereins,  Ja.  '13,  p.  1. 
The  present  position  of  the  preparation  of  zinc  and  lead  ores  in 
Upper  Silesia. 


34  MISSOURI    SCHOOL    OF    MINES. 

362  Requirements  for  successful  ore-flotation. 
Metl.  &  Chem.  Engng.  v.  11,  p.  118-119.     Mr.  '13. 

363  Selective  flotation  at  Broken  Hill. 

Min.  &  Sci.  Pr.  v.  106,  p.  915.    Je.  14,  '13;  v.  107,  p.  334.    Ag.  30,  '13. 

364  Shellshear,  Wilton.     Mineral  flotation. 
Min.  &  Sci.  Pr.  v.  107,  p.  622.     O.  18,  '13. 

365  Spicer,  H.  N.    Evolution  of  methods  of  handling  slime. 
Australian  practice. 

Metl.  &  Chem.  Engng.  v.  11,  p.  315-319.    Je.  '13.    Illus. 

366  Sulman,  H.  Livingstone.     Concentration  by  flotation. 
Min.  &  Sci.  Pr.  v.  106,  p.  554.     Ap.  12,  '13. 

367  Tailings  and  ore  treatment  at  Broken  Hill. 
Min.  &  Sci.  Pr.  v.  107,  p.  104-105.     Jl.  19,  '13.     Illus. 

368  Walker,  Edward.     Concentration  by  flotation. 
Min.  &  Sci.  Pr.    v.  106,  p.  29-30.     Ja.  4  ,'13.     Illus. 

369  Wood,  Henry  E.    Concentration  of  telluride  ores. 
Eng.  &  Min.  Jour.  v.  95,  p.  885-886.     My,  3,  '13. 

370  The  flotation  of  minerals.     Describing  the  Wood  flo- 
tation process  and  three  types  of  machines. 

Eng.  Mag.  v.  44,  p.  612-G14.     Ja.  '13.     Illus. 

371  Yeatman,  Pope.     Braden  Copper  Co. 
Min.  &  Sci.  Pr.  v.  107,  p.  19-20.    Jl.  5,  '13. 

372  Zinc  Corporation  and  flotation  processes. — Murex  Magnetic  Co.'s 
affairs. 

Min.  &  Sci.  Pr.  v.  107,  p.  26.    Jl.  5,  '13.    Illus. 

1914 

373  Bevan,  John.     Application  of  flotation  to  gold  ores. 
Min.  &  Sci.  Pr.  v.  109,  p.  413-414.     S.  12,  '14. 

374  Briggs,  Henry.    A  medieval  precursor  of  oil  flotation. 
Eng.  &  Min.  Jour.  v.  97,  p.  553-554.     Mr.  14,  '14. 

375  Bush,  Paris  V.     Phelps-Dodge  in  the  Burro  Mountains. 
Eng.  &  Min.  Jour.  v.  98,  p.  375-377.     Ag.  29,  '14.     Illus. 

376  Channing,  J.  Parke.     Flotation  process  of  ore  concentration. 
Min.  &  Engng.  Wld.  v.  40,  p.  333-334.    F.  14,  '14. 

377  Chapman  and  Tucker  flotation  patents. 
Eng.  &  Min.  Jour.  v.  98,  p.  476.     S.  12,  '14. 

378  Collins,  George  E.     Concentration  of  complex  sulphide  ore  from 
the  Mary  Murphy  Mine. 

Metl.  &  Chem.  Engng.  v.  12,  p.  243-246.     Ap.  '14. 


MISSOURI    SCHOOL    OF   MINKS.  35 

379  Cohn,  Jesse  E.     Timber-Butte  new  concentrator.     The  process 
is    a   combination    of    gravity    and    flotation    concentration. — Two 
products,  lead-iron  concentrates   and   finished  zinc   concentrates. 

Min.  &  Engng.  Wld.  v.  40,  p.  1049-1052.     Je.  6,  '14.     Illus. 

380  Demonstrating  the   selective   action   of  the   flotation   principle. 
Min.  Sci.  v.  69,  p.  50-51.     Mr.  '14. 

381  Developments  in  concentration  methods. 
Metl.  &  Chem.  Engng.  v.  12,  p.  5-6.    Ja.  '14. 

382  Dry  concentration  and  flotation  at  Joplin. 
Metl.  &  Chem.  Engng.  v.  12,  p.  492-493.    Ag.  '14. 

383  Flotation  an  increasing  factor  in  zinc  production. 
Min.  Sci.  v.  69,  p.  39-41.     F.  '14. 

384  Flotation  and  cyaniding. 

Metl.  &  Chem.  Engng.  v.  12,  p.  221-222.    Ap.  '14. 

385  Flotation  at  Butte,  Montana. 
Min.  Mag.  v.  11,  p.  66-67.     Jl.  '14. 

386  The  flotation  concentration  of  ores. 
Minr.  Ind.  v.  23,  p.  855-866.     1914. 

387  Flotation  in  southeast  Missouri. 

Eng.  &  Min.  Jour.  v.  98,  p.  359.    Ag.  22,  '14. 

388  Flotation  of  lead  and  copper  ores. 
Metl.  &  Chem.  Engng.  v.  12,  p.  77.     F.  '14. 

389  Flotation  of  the  Elm  Orlu  ores. 

Min.  &  Sci.  Pr.  v.  109,  p.  545-546.     O.  10,  '14. 

390  Flotation  of  zinc  sulphides. 

Eng.  &  Min.  Jour.  v.  79,  p.  1208.     Je.  13,  '14. 

391  The  flotation  process  in  Arizona. 

Min.  &  Engng.  Wld.  v.  40,  p.  510.     Mr.  14,  '14. 

392  French,  Herbert  J.     Flotation  tests  on,  ores  from  Bisbee  and 
Cobalt. 

Sch.  Mines  Quar.  v.  36,  p.  57-67.     N.  '14. 

393  Frost,  G.  J.    Acid-gas  flotation. 
Min.  Mag.  v.  10,  p.  281.    Ap.  '14.1 

394  Gayford,  Ernest.     Mill  of  National  Copper  Mining  Co. 
Eng.  &  Min.  Jour.  v.  97,  p.  1275-1278.     Je.  27,  '14.     Illus. 

395  Greenway  and  Lowrey  flotation  patent. 
Eng.  &  Min.  Jour.  v.  98,  p.  173.     Jl.  25,  '14. 

396  *Heym,  Ingenieur.     Der  Schwemmprozess  fur  Mineralien. 
Kali,  Erz  &  Kohle,  1914.     No.  18,  p.,  627. 

The  flotation  process  for  minerals, 


36  MISSOURI    SCHOOL    OF    MINKS. 

397  Horwood,   E.    J.      The   preferential   flotation   of   zinc    sulphides 
from  mixed  sulphides  by  the  Horwood  process. 

*Proc.  Aust.  Inst.   Min.  Engrs.     N.  12,  '13,  p.  333. 
Min.  Jour.  v.  105,  p.  415-41G.     My.  2,  '14. 

398  Horwood  flotation  process. 

Min.  Mag.  v.  10,  p.  375-376.     My.  '14. 

399  Hyde,  James  M.     The  Murex  process  in  a  German  works. 
Metall  und  Erz.  v.  11  (N.  F.  II),  p.  580-581.    Ag.  22,  '14. 

Min.  &  Sci.  Pr.  v.  108,  p.  931-933.    Je.  6,  '14.    Illus. 

400  Interest  in  oil  flotation. 

Eng.  &  Min.  Jour.  v.  98,  p.  279.     Ag.   8,  '14. 

401  Keedy,  Dyke  V.     Concentration  of  complex  sulphide  ore  from 
the  Mary  Murphy  Mine. 

Metl.  &  Chem.  Engng.  v.  12,  p.  157-161.     Mr.  '14. 

402  Laist,  Frederick  and  Wiggin,  Albert  F.     The  slime  concentrat- 
ing plant  at  Anaconda. 

Bull.  Am.  Inst.  Engrs.     Ag.  '14.     p.  2201-2215.     Illus. 

403  *Liwehr,  August  E.     Die   flotationscheidung. 
Oesterreichische  Zeit.  f.  B.  u.  H.     Ag.  29,  '14. 

404  Lyon  Dorsey  A.  and  Arentz,  Samuel  S.     Losses  of  zinc  in  min- 
ing, milling,  and  smelting. 

Bull.  Am.  Inst.  Min.  Engrs.     Jl.  '14,  p.  1419-1420.     Illus. 

405  Moore,  Richard  B.  and  Kithil,  Karl  L.     A  preliminary  report 
on  uranium,  radium  and  vanadium. 

U.  S.  Bureau  of  Mines  Bulletin  No.  70,  p.  35-41.     1914.     Illus. 

406  Motherwell,  William.     Flotation  tests  at  Mt.  Morgan. 
Min.  &  Sci.  Pr.  v.  108,  p.  1044-1046.     Je.  27,  '14. 

407  The  Murex  process  at  Clausthal. 
Min.  Mag.  v.  11,  p.  66.     Jl.  '14. 

408  Das  Murex-Verfahren. 

Metall  und  Erz.  v.  11,  (N.  F.  II),  p.  207.    Mr.  22,  '14. 

409  Oil  flotation  at  Butte  and  Superior. 
Metl.  &  Chem.  Engng.  v.  12,  p.  222.     Ap.  '14. 

410  Ore  dressing  by  flotation  process. 
Mex.  Min.  Jour.  v.  18,  p.  364.     D.  '14. 

411  Parmelee,  H.  C.     Concentration  of  complex  sulphide  ore  from 
Mary   Murphy   Mine. 

Metl.   &  Chem.  Engng.  v.   12,  p.  21-26.     Ja.  '14.     Illus. 

412  Pine  oils  for  flotation. 

Eng.  &  Min.  Jour.  v.  98,  p.  829-830.     N.  7,  '14. 

413  Preferential  flotation  of  zinc  sulphide  by  the  Horwood  process. 
Metl.  &  Chem.  Engng.  v.  12,  p.  414-415.     Je.  '14, 


MISSOURI    SCHOOL   OF    MINES.  37 

414  Schranz,   H.      Ein   experimenteller   Beitrag   zur    Kenntnis    der 
Schwimmvermogen. 

Metall  und  Erz.  v.  11   (N.  F.  II),  p.  462-470.     Jl.  1,  '14.     Illus. 

415  Schwarz,  Alfred.    Table  concentration  vs.  flotation. 
Eng.  &  Min.  Jour,  v.  98,  p.  317.     Ag.  15,  '14. 

416  Selective   flotation. 

Min.   Mag.  v.  10,  p.  19-20.     Ja.  '14. 

417  Selective  flotation  by  Horwood's  process. 
Metl.  &  Chem.  Engng.  v.  12,  p.  350.     My.  '14. 

418  Slime  treatment  at  Broken  Hill. 
Min.  Jour,  v,  91,  p.  1279-1280.     N.  5,  '10. 

Metall  u.  Erz,  v.  11  (N.  F.  II),  p.  351-352.     My.  8,  '14. 

419  The  southeastern  Missouri  mine  managers  become  co-operative. 
Eng.  &  Min.  Jour.  v.  98,  p.  715.     O.  17,  '14. 

420  Treatment  of  slimes.     A  big  difficulty  overcome. 
Aust.  Min.  Stand,  v.  51,  p.  47.     Ja.  15,  '14. 

421  Valentiner,  S.     Zur  Theorie  der  Schwimmverfahren. 
Metall  und  Erz.  v.  11  (N.  F.  II),  p.  455-462.    Jl.  1.  '14.    Illus. 

1915 

422  About  flotation. 

Min.  &   Sci.  Pr.  v.  Ill,  p.  155-156.     Jl.  31,  '15. 

423  Bains,  Thomas  M.     The  electrical  theory  of  flotation — II. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  883-894.    D.  11,  '15. 

424  Belchic,  George.     Flotation  of  Joplin-galena  slime. 
Metl.  &  Chem.  Engng.  v.  13,  p.  847.     N.  15,  '15. 

425  Block,  James  A.    Why  is  flotation? 

Min.  &  Sci.  Pr.  v.  Ill,  p.  659-660.     O.  20,  '15. 

426  Blyth,  W.  B.     Flotation  in  gold  metallurgy. 
Metl.  &  Chem.  Engng.  v.  13,  p.  309.    My.  '15. 
*Aust.  Inst.  Min.  Eng.  Bull.  16. 

427  Flotation:     Its  spheres  of  usefulness  in  gold  metal- 
lurgy. 

Min.  &  Sci.  Pr.  v.  110,  p.  523.     Ap.  3,  '15. 

428  Bradford  selective  flotation. 

Eng.  &  Min.  Jour.     v.  100,  p.  562.     O.  2,  '15. 

429  Brick  from  flotation  tailings  at  Anaconda. 
Eng.  &  Min.  Jour.  v.  99,  p.  455.     Mr.  6,  '15. 

430  Broken  Hill  milling  practice. 

Eng.  &  Min.  Jour.  v.  100,  p.  151-153.    Jl.  24,  '15. 

431  Butters,  Chas.    Flotation  of  gold  ores. 
.  &  Sci.  Pr,  v.  Ill,  p.  954.    P.  25,  '15. 


38  MISSOURI    SCHOOI,    OF    MINES. 

432  Butters,  Chas.  and  Clennell,  J.  E.     Cyanide  treatment  of  flota- 
tion concentrate. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  778-785.     N.  20,  '15. 

433  Callow,  J.  M.     Callow  flotation  process. 

Eng.  &  Min.  Jour.  v.  100,  p.  919-923.     D.  4,  '15.     Illus. 

434  Flotation  of  coprer  ores. 

Min.  &  Sci.  Pr.   v.  110,  p.  826-828.    My.  29,  '15.    Illus. 

435  Notes  on  flotation. 

Mex.  Min.  Jour.  v.  20,  p.  438-440.     D.  '15. 

From  a  paper  read  before  the  New  York  meeting  of  the  A.  I.  M.  E. 
F.  '16. 

436  Notes  on  flotation.     Historical  sketch. 

Bull.  Am.  Inst.  Min.  Engrs.  No.  108,  p.  2321-2339.     D.  '15.     Illus. 

437  Callow  pneumatic  process  of  flotation. 

Metl.  &  Chem.  Engng.  v.  13,  p.  571-572.     S.  1,  '15.     Illus. 

438  Carpenter,   Jay   A.      Slime   agitation   and   solution    replacement 
methods  at  the  West  End  Mill,  Tonopah,  Nevada. 

Bull.  Am.  Inst.  Min.  Engrs.     No.  104.     Ag.  '15,  p.   1639-1651.     Illus. 

439  Collins,  George  E.    Everson. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  881.     D.  11,  '15. 

440  Concentration  of  copper  ores  by  flotation. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  304-305.     Ag.  28,  '15. 

441  The  concentrator  of  the  Baden  Copper  Co. 
Mex.  Min.  Jour.  v.  20,  p.  429-430.     D.  '15. 

Abstract  of  a  description  by  The  Mill  Staff  in  Teniente  Topics. 

442  Copper  and  the  flotation  process. 
Metl.  &  Chem.  Engng.  v.  13,  p.  133.    Mr.  '15. 

443  Coutts,  J.     Methods  of  testing  oils  for  the  Minerals  Separation 
process. 

Aust.  Min.  Stand,  v.  53,  p.  255.     Ap.  8,  '15. 
Metl.  &  Chem.  Erigng.  v.  13,  p.  389-390. 

444  Drucker,  A.  E.     Flotation  on  gold  ores. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  772.     N.  20,  '15. 

445  Durell,  Charles  T.     Liquid  jets.     A  study  of  a  phenomenon  of 
importance  in  flotation  and  cyanidation. 

Metl.  &  Chem.  Engng.  v.  13,  p.  714-716.    O.  15,  15. 

446  Why  is  flotation. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  428-431.     S.  18,  '15. 

447  Easton,  W.  B.    Tube-milling  for  the  flotation  or  oil-concentration 
process. 

Metl.  &  Chem.  Engng.  v.  13,  p.  89-90.    F.  '15.    Illus. 

448  Effects  of  soluble  components  of  ore  on  flotation. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  931-932.     D.  18,  '15. 


MISSOURI    SCHOOIv   OF    MINES.  39 

449  Fleming,  James  A.     Recent  progress  in  flotation. 
Eng.  &  Min.  Jour.  v.  100,  p.  233-234.     Ag.  7,  '15. 

450  Flotation. 

Min.  Mag.  v.  10,  p.  146-147.     F.  '14. 

Min.  &  Sci.  Pr.  v.  106,  p.  106-107.    Ja.  11,  '13;  v.  Ill,  p   3.    Jl.  3,  '15. 

451  Flotation  and  cyanidation. 

Metl.  &  Chem.  Engng.  v.  13,  p.    880-881.    D.  1,  '15. 

452  Flotation  as  a  conservation  measure. 
Metl.  &  Chem.  Engng.  v.  13,  p.  344-345.    Je.  '15. 

453  Flotation  at  Broken  Hill. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  91.     Jl.  17,  '15;   p.  343-344.     S.  4,  '15. 

454  Flotation  at  Colorado  School  of  Mines. 
Min.  Sci.  v.  72,  No.  1766,  p.  4.     D.  18,  '15. 

455  Flotation  at  Cripple  Creek. 

Eng.  &  Min.  Jour.  v.  100,  p.  964-965.     D.  11,  '15. 

456  Flotation  at  Globe-Miami,  Ariz. 

Eng.  &  Min.  Jour.  v.  100,  p.  1001-1002.     D.  18,  '15. 

457  Flotation  at  Gold  Hunter. 

Salt  Lake  Min.  Rev.  v.  17,  p.  27.     Ap.  15,  '15. 

458  Flotation  at  Gold  Hunter  Mill. 

Eng.  &  Min.  Jour.  v.  100,  p.  1044-1046.     D.  25,  '15.     Illus. 

459  Flotation  at  Inspiration. 
Min.  Mag.  v.  8,  p.  340.     My.  '13. 

Metl.  &  Chem.  Engng.  v.  11,  p.   309.     Je.  '13.~~ 
Min.  &  Sci.  Pr.  v.  Ill,  p.  7-10.     Jl.  3,  '15.     Illus. 

460  Flotation  at  Mt.  Morgan,  Queensland. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  310.     Ag.  28,  '15. 

461  Flotation  at  Silverton. 

Salt  Lake  Min.  Rev.  v.  17,  p.  20.     Ag.  30,  '15. 

462  Flotation  at  the  Consolidated  Arizona  Smelting  Co.,  Humboldt, 
Arizona. 

Metl.  &  Chem.  Engng.  v.  13,  p.  897-901.    D.  1,  '15.     Illus. 

463  Flotation  at  the   Timber  Butte  Mill,   Montana. 
Metl.  &  Chem.  Engng.  v.  13,  p.  447-449.     Jl.  '15.     Illus. 

464  Flotation  for  copper  and  silver  ores. 
Min.  Jour.  v.  110,  p.  477.     Jl.  3,  '15. 

465  Flotation  in  a  Mexican  Mill. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  122-126.     Jl.  24,  '15. 

466  Flotation  in  North  America. 
Min.  Mag.  v.  12,  p.  190-192.    Ap.  '15. 

467  The  flotation  of  copper  ores. 

Min.  &  Sci.  Pr.  v.  110,  p.  680-682.     My.  1,  '15. 


40  MISSOURI    SCHOOL    01?    MINES. 

468  Flotation  oils. 

Eng.  &  Min.  Jour.  v.  99,  p.  462.     Mr.  6,  '15. 
Min.  Sci.  v.  72,  No.  1762,  p.  16.    N.  20,  '15. 

469  Flotation  oil  specialists. 

Min.  &  Engng.  Wld.  v.  43,  p.  378.     S.  4,  '15. 

470  The  flotation  process. 

Eng.  Mag.  v.  35,  p.  865-867.     S.  '08. 

Eng.  &  Min.  Jour.  v.  96,  p.  1037.     N.  29,  '13;   v.  99,  p.  99-100.     Ja. 
9,  '15. 

471  French,  H.  J.     Flotation  tests  on  Bisbee  and  Cobalt  ores. 
Metl.  &  Chem.  Engng.  v.  13,  p.  509.    Ag.  '15. 

472  —    Flotation  tests  on  Cobalt  silver  ores. 
Can.  Min.  Jour.  v.  36,  p.  400-401.     Jl.  1,  '15. 

473  Froth  and  flotation.     An  early  recognition  of  the  importance  of 
froth  in  the  flotation  process  by  three  students  at  the  University 
of  California. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  160-161.     Jl.  31,  '15. 

474  Gahl,  Rudolf.     Flotation  results. 

Metl.  &  Chem.  Engng.  v.  13,  p.  408.     Jl.  '15. 

475  Galbraith,  Charles  S.     Flotation  in  Australia. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  83-86.     Jl.  17,  '15.     Illus. 

476  Grades  and  kinds  of  oil  for  flotation  processes. 
Min.  &  Engng.  Wld.  v.  43,  p.  481-482.     S.  25,  '15.    Illus. 

477  Hebbard,  James.     Evolution  of  Minerals  Separation  process  on 
Central  Mine,  Australia. 

*Trans.  Aus.  Inst.  Min.  Eng.  No.  10,  1913.     Illus. 
Abstract.     Min.  &  Sci.  Pr.  v.  Ill,  p.  347-353.     S.  4,  '15. 

478  The  Horwood  flotation  process  for  zinc  sulphides. 
Min.  &  Engng.  Wld.  v.  42,  p.  13-14.    Ja.  2,  '15. 

479  Ingalls,  H.   W.     The  Hunter  Mining  Co.'s   flotation  plant. 
Min.  &  Engng.  Wld.   v.  42,  p.  460.    Mr.  6,  '15. 

480  Laughlin,  J.  P.  M.    Progress  in  oil  flotation. 
Salt  Lake  Min.  Rev.  v.  16,  p.  40-42.     Ja.  15,  '15. 

481  A  lost  page  in  the  history  of  oil  flotation. 
Min.  Sci.  v.  72,  No.  1762,  p.  3.    N.  20,  '15. 

482  Low,  V.  F.  Stanley.     Flotation  on  dump  ore. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  879-880.     D.  11,  '15. 

483  McClave,  James    M.      Oil    flotation    process   in    a    nut    shell. 
Min.  Sci.  v.  72,  No.  1759,  p.  8.     O.  30,  '15. 

484  Marvin,  Henry  A.    Development  of  ore  concentration. 
Eng.   Mag.  v.   49,  p.   218-230.     My.   '15.     Illus.      (p.   229-230.) 


MISSOURI    SCHOOL   OF    MINES.  41 

485  Mathewson,  E.  P.    Flotation  at  Washoe  Reduction  Works,  Ana- 
conda. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  312-313.    Ag.  28,  '15.    Illus. 

486  Megraw,  Herbert  A.     Metallurgy  in  the  Coeur  d'Alenes. 
Eng.  &  Min.  Jour.  v.  100,  p.  827-830.    N.  20,  '15.     Illus. 

487  The  new  copper  metallurgy. 

Eng.  Mag.  v.,  48,  p.  675-688.    F.  '15.    Illus.  (p.  677-679.) 

488  The  metallurgy  of  zinc. 

Bull.  Am.  Inst.  Min.  Engrs.    p.  2705-2714.     1915. 

489  Molybdenum  recovery  by  Elmore  process. 
Eng.  &  Min.  Jour.  v.  99.   p.  907.    My.  22,  '15. 

490  Mueller,  William  A.    Use  of  coal  tar  in  flotation. 
Eng  &  Min.  Jour.  v.  100,  p.  591-593.     O.  9,  '15. 

491  A  new  flotation  experiment. 

Eng.  &  Min.  Jour.  v.  100,  p.  900.     N.  27,  '15. 

492  New  flotation  installations. 

Eng.  &  Min.  Jour.  v.  100,  p.  668.     O.  23,  '15. 

493  Oils  and  flotation. 

Min.  &  Sci.  Pr.  v.  110,  p.  675-676.    My.  1,  '15. 

494  Operations  at  Old  Dominion. 

Eng.  &  Min.  Jour.  v.  100,  p.  1002.     D.  18,  '15. 

495  Pine  oil  supply  for  flotation  concentration. 
Eng.  &  Min.  Jour.  v.  99,  p.  619.     Ap.  3,  '15. 

496  Preferential  flotation. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  668.    O.  30,  '15. 

497  Prosser,  Warren  C.     Concentrating  Gold  King  ores. 
Eng.  &  Min.  Jour.  v.  100,  p.  633-634.    O.  16,  '15.    Illus. 

498  Ralston,  O.  C.     Preferential  flotation. 
Min.  &  Sci.  Pr.  v.  110,  p..  980-984.    Je.  26,  '15. 

499  — Why  do  minerals  float? 

Min.  &  Sci.  Pr.  v.  Ill,  p.  623-627.     O.  23,  '15. 

500  Ralston,  O.  C.  and  Cameron,  F.     Recent  progress  in  flotation. 
Eng.  &  Min.  Jour.  v.  99,  p.  937-940.     My.  29,  '15;   v.  100,  p.  68-69. 

Jl.  10,  '15. 

501  Read,  Thomas  T.    The  Engels  mine  and  mill. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  167-171.     Jl.  31,  '15.    Illus. 

502  Revett,  Ben  S.     How  my  first  introduction  to  flotation  bubbles 
cost  me  hard  labor  and  more  bubbles. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  590-591.     O.  16,  '15. 

503  Rickard,  T.  A.     Charles  Butters  and  the  new  metallurgy. 
Min.  &  Sci,  Pr.  v.  Ill,  p.  273-279.     Ag.  21,  '15.     Illus. 


42  MISSOURI    SCHOOL    OF    MINES. 

504  What  is  flotation? 

Min.  &  Sci.  Pr.  v.  Ill,  p.  383-386.     S.  11,  '15;   p.  513-517.     O.  2,  '15. 
Illus. 

505  Salinger,  Herbert.     Flotation  plant  of  the  Utah  Leasing  Co. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  899.     D.  11,  '15. 

Salt  Lake  Min.  Rev.    v.  17,  p.  9-11.     N.  15,  '15.    Illus. 

506  Schwarz,  A.     Recent  progress  in  flotation. 
Eng.  &  Min.  Jour.  v.  99,  p.  1084.     Je.  19,  '15. 

507  Shellshear,  W.     Disposal  of  flotation  residue. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  892-895.     D.  11,  '15.     Illus. 

508  Simons,  Theodore.     The  concentrator  of  the  Timber  Butte  Mill- 
ing Co.,   Butte,  Mont. 

Bull.  Am.  Inst.  Min.  Engrs.     S.  '15;  p.  1295-1316.    Illus. 

509  -    Oil  flotation  at  Timber  Butte. 
Salt  Lake  Min.  Rev.  v.  16,  p.  17-18.     F.  28,  '15. 

510  Smith,  H.   Hardy.     Flotation   of  silver-lead   mineral  at   a   New 
South  Wales  mine. 

Eng.  &  Min.  Jour.  v.  100,  p.  953-956.     D.  11,  '15.     Illus. 

511  Smith,  Ralph  W.     Flotation  testing  machine. 
Eng.  &  Min.  Jour.  v.  100,  p.  395-396.     S.  4,  '15.     Illus. 

512  -    Gravity  vs.  oil  flotation  concentration. 
Min.  Sci.  v.  71,  p.  53-57.     Je.  '15.     Illus. 

513  Testing  Bisbee  ores  for  flotation. 

Min.  &  Engng.  Wld.  v.  43,  p.  145.    Jl.  24,  '15. 

514  Testing  oils  for  flotation. 

Eng.   &  Min.  Jour.  v.  99,  p.  1079-1080.     Je.  19,  '15. 
Metl.  &  Chem.  Engng.  v.  13,  p.  389-390.    Je.  '15. 

515  Timber  Butte  Mill,  Montana. 

Min.  &  Engng.  Wld.  v.  42,  p.  29-30.     Ja.  2,  '15.     Illus. 

516  Two  historical  notes  on  flotation. 

Metl.  &  Chem.  Engng.  v.  13,  p.  471-472.    Ag.  15. 
Sci.  Amer.  Supp.  v.  80,  p.  182.     S.  18,  '15. 

517  Williams,  Henry  D.  and  Kenyon,  W.  Houston.     Air-froth  flota- 
tion. 

Min.  &  Sci.  Pr.    v.  Ill,  p.  701-706.    N.  6,  '15.    Illus. 

518  The  Wood  flotation  machine. 

Eng.  &  Min.  Jour.  v.  99,  p.  455.     Mr.  6,  '15.     Illus. 

1916 

519  Callow,  J.  M.     The  cost  of  flotation. 
Metl.  &  Chem.  Engng.  v.  14,  p.  32.     Ja.  1,  '16. 

520  Dorr  machines  in  the  flotation  process. 

.  &  Engng.  Wld.  v.  44,  p.  70.     Ja.  8,  '16. 


MISSOURI    SCHOOL    OF    MINES.  43 

521  Flotation  at  Humboldt,  Arizona. 
Min.  &  Sci.  Pr.  v.  112,  p.  41.     Ja.  8,  '16. 

522  Flotation   in    1915. 

Metl.  &  Chem.  Engng.  v.  14,  p.  2-3.     Ja.  1,  '16. 

523  Huston,    George.      Why    is    notation? 
Min.   &   Sci.   Pr.  v.   112,  p.   6-7.     Ja.   1,  '16. 

524  Megraw,  Herbert  A.    Progress  of  notation  in  1915. 
Eng.  &  Min.  Jour.  v.  101,  p.  97-99.     Ja.  8,  '16. 

On  p.  98  is  a  map  showing  companies  using  or  experimenting  with 
notation  in  the  United  States. 

525  New  ideas  about  flotation. 

Eng.  &  Min.  Jour.,  v.  101,  p.  22-23.     Ja.  1,  '16.    Illus. 

526  Ralston,  O.  C.  and  Allen,  Glenn  L.    Testing  ores  for  the  flotation 
process. 

Min.   &   Sci.   Pr.   v.   112,  p.   8-13.     Ja.   1,  '16.     Illus.;    p.   44-49.     Ja. 
8,    '16.     Illus. 

527  Sherwood,  C.  F.     Pine  oil  for  flotation. 
Eng.    &   Min.  Jour.   v.   101,   p.    21-22.     Ja.   1,   '16. 

528  Testing   for   flotation. 

Min.   &   Sci.   Pr.   v.   112,   p.  35-36.     Ja.  8,   '16. 

529  Tupper,  C.  A.     Flotation— Its  progress  and  its  effect  upon  mill 
design. 

Min.   &  Engng.  Wld.  v.  44,  p.  1-14.     Ja.  1,  '16.     Illus. 

530  Whitaker,  W.  A.  and  Belchic,  George.     A  form  for  the  classi- 
fication of  flotation  data. 

Metl.  &  Chem.  Engng.  v.  14,  p.  33.    Ja.  1,  '16.    Illus. 


44  MISSOURI    SCHOOL    OF    MINES. 

COLLOIDS  AND  SURFACE  TENSION 

Bibliography. 

531  *Miiller,  A.     Bibliography  of  colloids. 
Zeit.  Anorg.  Chem.  v.  39,  p.  121.     1904. 

"A  bibliography  of  colloids  containing  three  hundred  and  fifty-six 
references.  There  is  an  appendix  in  which  the  articles  are  grouped 
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General  Works. 

532  *B6rnstein,  Richard,  and  Roth,  Walther  A. 

Landolt-Bornstein  physikalisch-chemische  tabellen. 
4  ed.  Berlin.     1915. 
Tables  and  data. 

533  Boys,  C.  V.     Soap-bubbles:     Their  colors  and  the  forces  which 
mould  them.     London.     1912.     Illus. 

534  *Findlay,  Alex.     Practical  physical  chemistry.     3  ed.     London. 
1915.    Illus. 

535  *Freundlich,    Herbert.    Kapillarchemie.    Eine    darstellung    der 
kolloide  und  vernandter  gebiete.     Leipzig.     1909. 

The  author  has  divided  the  work  into  two  parts,  the  first  is  con- 
cerned with  the  properties  of  surfaces  in  general  and  part  two 
is  devoted  to  dispersed  systems.  Foams  are  treated  in  part  two. 

536  Getman,  Frederick  H.     Laboratory  exercises  in  physical  chem- 
istry.    N.  Y.     1904. 

p.   40-44.     Illus. 

537  Gibbs,   J.   Willard.     The   scientific  papers.     2  v.     N.  Y.     1906. 
The  equilibrium  of  heterogeneous   substances,  p.  54-353,  especially 
p.  219.     Reprinted   from   *   Transactions   of   the   Connecticut  Aca- 
demy, v.  3,  p.  108-248;  343-524.    1875-1877. 

Abstract  of  the  above  paper  p.  354-371.    Reprinted  from 
American  Journal  of  Science  Ser.  3,  v.  16,  p.  441-458.     1878. 

538  Thermodynamische    studien    unter    mitwirkung    des 
verfassers  aus  dem  Englischen  ubersetzt  von  W.  Ostwald.     Leip- 
zig.    1892. 

539  Gray,  Francis  W.     A  manual  of  practical  physical  chemistry. 
London.     1914. 

p.    65-69. 

540  *Janek,  A.     A  text  book  of  dispersoidology   (Modern  colloidal 
chemistry).      Petrograd.     1915. 

Carefully  systematized  material  on  the  subject  of  colloidal  chem- 
istry with  references  and  methods.  Valuable  for  experimental  and 
research  work.  In  Russian. 

541  Kohlrausch,  Friedrich.    Lehrbuch  der  practischen  physik.     llth 
ed.     Leipzig.     1910. 


MISSOURI    SCHOOL,   OF    MINES.  45 

542  Luther,   R.   und   Drucker,   K.     Ostwald-Luther  hand-und   hiilfs- 
buch   zur  aufiihrung  physiko-chemischer  messungen.     3   auflage. 
Leipzig.     1910. 

p.    233-241. 

543  Marie,    Ch.     ed.      Tables   annuelles   de   constantes   et   donnees 
numeriques  de  chimie,  de  physique  et  de  technologie.     v.  1-date. 
1910-date.     Paris.    1912-date. 

Tables   and    data. 

544  Miiller,   Arthur.     Allgemeine   chemie   der   Kolloide.     Handbuch 
der  angewandten  physikalischen  chemie.  Band  8.    1907. 

A  valuable  summary  of  much  of  the  work  on  colloids  giving  a  mass 
of  well  arranged  data  under  the  following  heads:  Methods  of  pre- 
paring inorganic  colloids;  organic  colloids;  properties  of  colloidal 
solutions;  colloidal  gels;  theories  of  colloids;  systematic  classifica- 
tion of  colloids. 

545  Ostwald,  Wilh.     Lehrbuch  der  allgemeinen  chemie.     2  auflage. 
1  Land.     1903. 

p.    514-543. 

Chapter  on   surface   tension. 

546  Partington,    James    Riddick.     A   text-book   of   thermodynamics 
(with  special  reference  to  chemistry).    N.  Y.     1913. 

p.    429-449.     Illus. 

547  Pockels,  F.     Kapillaritat.     (In  Winklemann,  A.     Handbuch  der 
physik.      2    auflage.      1    Band.      2    Halfte.      p.    1119-1234.      1908.) 

548  Rohland,  Paul.     The  colloidal  and  crystalloidal  state  of  matter. 
London.     1911. 

549  Spencer,  James  Frederick.    An  experimental  course  of  physical 
chemistry.     London.     1911. 

p.   139-148.     Illus. 

550  Stieglitz,  Julius.    The  elements  of  qualitative  chemical  analysis. 
N.    Y.      1911. 

p.    125-138. 

A  very  clear  explanation  of  the  colloidal  condition,  easily  under- 
stood by  students. 

551  Svedberg,  Dr.  Theodor.    Die  Methoden  zur  Herstellung  Kolloider 
Losungen  Anorganischer  Stoffe.     Dresden.     1909. 

552  Taylor,  W.  W.     Chemistry  of  colloids  and  some  technical  ap- 
plications.    N.   Y.     1915. 

553  Van   Bemmelen,   J.    M.     Die   Absorption   Gesammelte   Abhand- 
lungen    uber    Kolloide    und    Absorption,    mit    unterstutzung    des 
verfassers  neu  herausgegeben  von  Wo.  Ostwald.    Dresden.    1910. 

The  collected  works  of  Van  Bemmelen  on  colloids  and  absorption. 

554  Watson,  W.     Textbook  of  physics.     8th  imp.     4  ed.     London. 
1907. 

p.  180-184. 


46  MISSOURI   SCHOOL   OF   MINKS. 

555  Willows,  R.  S.  and  Hatschek,  E.     Surface  tension  and  surface 
energy  and  their  influence  on  chemical  phenomena.     Philadelphia. 
1915. 

Treats  existence  and  theory  of  surface  tension;  relations  between 
surface  tension  and  other  physical  constants;  relations  between 
surface  tension  and  chemical  constants;  factors  affecting  distribu- 
tion of  a  solute  in  solution;  effect  of  electric  charge  on  surface 
tension. 

556  Winkleman,  A.     Absorption  und  adsorption.     (In  his  Handbuch 
der  physik.    2  auflage.    1  Band.    2  Halfte.    p.  1507-1542.    1908.) 

557  Zsigmondy,    Richard.      Colloids    and    the    ultramicroscope.      A 
manual    of    colloid    chemistry    and    ultramicroscopy.      Authorized 
translation  by  Jerome  Alexander.     N.  Y.     1909. 

A  general  outline  of  colloid  chemistry  with  a  detailed  account  of 
the  characteristics  of  special  colloids  including  colloidal  sulphides, 
oxides,  metals,  and  non-metals. 

Articles   in    Periodicals. 

558  Allen,  A.  W.     Colloids  in  ore  dressing. 
Min.  &  Sci.  Pr.  v.  107,  p.  109-110.     Jl.  19,  '13. 

559  Ashley,  Harrison  Everett.     The  colloid  matter  of  clay  and  its 
measurement.     1909. 

U.  S.  Geological  Survey,  Bulletin  388. 

560  Technical  control   of  the   colloidal  matter  of  clays. 
N.    '11. 

U.  S.  Bureau  of  Standards,  Technical  Papers  No.  23. 

561  Bancroft,  Wilder  D.     The  coagulation  of  albumin   by   electro- 
lytes. 

Jour.  Phys.  Chem.  v.  19,  p.   349-359.     My.  '15. 
Trans.  Am.  Electroch.  Soc.  v.  27,  p.  195-207.     1915. 

562  —      Neutralization  of  adsorbed  irons. 
Jour.  Phys.  Chem.  v.  19,  p.  3G3-376.     My.  '15. 
Trans.  Am.  Electroch.  Soc.  v.  27,  p.  175-194.     1915. 

563  The  theory  of  colloid  chemistry. 
Jour.  Phys.  Chem.  v.  18,  p.  549-558.     O.  '14. 

564  The  theory  of  emulsification. 

Jour.  Phys.  Chem.  v.  16,  p.  177-233.  Mr.  '12.  Illus.;  p.  345-372. 
My.  '12;  p.  475-512.  Je.  '12.  Illus.;  p.  739-758.  D.  '12;  v.  17, 
p.  501-519.  Je.  '13;  v.  19,  p.  275-309.  Ap.  '15;  p.  513-529.  Je.  '15. 

These  papers  develop  and  expound  the  best  general  working  theory 
of  colloids,  froths,  emulsions  and  adsorption  that  can  be  found. 
With  rare  critical  acumen,  the  complete  literature  on  these  sub- 
jects is  passed  in  review,  sorted,  sifted,  amended,  and  recom- 
bined  into  an  eclectic  system  which,  while  years  in  advance  of 


MISSOURI    SCHOOL   OF    MINES.  47 

contemporaneous  treatises,  is  reduced  to  such  simple,  common- 
sense  terms  as  to  be  within  range  of  any  serious  minded  student. 

The  style  is  unhappily  difficult,  so  that  the  following  suggestions 
may  not  be  amiss.  After  several  readings  of  the  short  paper  on 
"The  Theory  of  Colloid  Chemistry,"  read  first  the  excellent  sum- 
maries at  the  ends  of  the  "Theory  of  Emulsification"  papers  be- 
fore undertaking  a  rapid  survey  of  the  whole  set;  follow  this  by 
a  more  careful  consideration  of  the  summaries  with  re-reading 
of  portions  of  the  text  when  necessary;  continue  this  process 
until  the  drift  of  the  argument  begins  to  reveal  itself. 

Other  papers  from  the  same  author's  laboratory  on  jellies,  emul- 
sions, and  the  theory  of  dyeing  will  be  found  to  be  not  unrelated, 
although  seemingly  more  remote  to  a  possible  future  theory  of 
flotation. 

An  eighth  article  on  "Emulsification"  appears  in  the  Jour.  Phys. 
Chem.  v.  20,  p.  1,  Ja.  '16,  and  of  this  'series  there  will  be  at  least 
one  more  preliminary  paper  on  froths  followed  by  an  article 
on  the  flotation  of  ores.  V.  H.  G. 

565  Bartlett,   J.   C.     The   action   of  small   spheres   of  solids   in  as- 
cending currents  of  fluids,  and  in  fluids  at  rest. 

Trans.  Am.  Inst.  Min.  Engrs.  v.  6,  p.  415-427.    My.  '77. 

566  Benson,    Clara   C.     The   composition   of  the   surface   layers   of 
aqueous  amyl  alcohol. 

Jour.   Phys.   Chem.  v.   7,  p.   532-536.     O.   '03.     Illus. 

567  Billitzer,  Jean.     Eine   Theorie  der  Kolloide  und   Suspensionen. 
Zeit.  Phys.  Chem.     45  Band,  p.  307-330.     O.  13,  '03. 

568 Theorie  der  Kolloide.     II. 

Zeit.  Phys.  Chem.    51  Band,  p.  129-166.    F.  28,  '05. 

569  Boys,  C.  V.    Experiments  with  soap  bubbles. 
Smithsonian    Inst.     Annual    Kept.      1912.      p.    211-218. 

570  Bradbury,  Robert  H.     Colloids  and  crystals,  the  two  worlds  of 
matter. 

Jour.  Fr.  Inst.  v.  176,  p.  319-328.     S.  '13. 

571  Briggs,  T.  R.     Experiments  on  emulsions:     Adsorption  of  soap 
in  the  benzine-water  interface. 

Jour.  Phys.  Chem.  v.  19,  p.  210-231.     Mr.  '15.     Illus. 

572  Briggs,    T.    Roland    and    Schmidt,    Hugo    F.      Experiments    on 
emulsions.     II.     Emulsions  of  water  and  benzene. 

Jour.  Phys.  Chem.  v,  19,  p.  478-499.     Je.  '15.     Illus. 

573  Caetani,   Gelasio.     Sand,   slime,   and   colloids   in   ore   dressing. 
Min.  &  Sci.  Pr.  v.  106,  p.  438-442.     Mr.  22,  '13. 

574  Cameron,  Frank  K.     Soil  colloids  and  the  soil  solution. 
Jour.   Phys.   Chem.   v.    19,   p.   1-13.     Ja.   '15. 

575  Colloids   and   their   importance.        x 
Min.   &  Sci.  Pr.  v.  107,  p.  87.     Jl.  19,  13. 


48  MISSOURI    SCHOOL    OF    MINES. 

576  Corliss,  Harry  P.     The   distribution  of  colloidal  arsenious  sul- 
phide between  the  two  liquid  phases  in  the  system  water,  ether, 
alcohol. 

Jour.  Phys.  Cheni.  v.  18,  p.  681-G94.     X.   '14.     Illus. 

577  Devaux,  H.  E.     Oil  films  on  water  and  on  mercury. 
Smithsonian  Institution.     Annual  Kept.     1913.     p.  261-273.     Illus. 

578  Donnan,   F.   G.   and   Barker,   J.   T.     Experimental   investigation 
of  Gibbs's  thermodynamical  theory  of  interfacial  concentration  in 
the  case  of  an  air-water  interface. 

Roy.  Soc.  Proc.  Ser.  A.  v.  85,  p.  557-573.     N.  30,  '11. 

579  Garrison,  Fielding,  H.    Josiah  Willard  Gibbs  and  his  relation  to 
modern  science. 

Pop.  Sci.  M.  v.  74,  p.  470-484.     My.  '09;    p.   551-561.     Je.   '09;    v.   75, 

p.  41-48.     Jl.  '09;   p.   191-203.     Ag.  '09. 
One  of  the  best  statements  of  Gibbs's  theory  to  be  found. 

580  Carver,   M.   M.     A   new   method   of   determining   the   range   of 
molecular  action  and  the  thickness  of  liquid  films. 

Jour.  Phys.  Chem.  v.  16,  p.  234-246.     Mr.  '12. 

581  On  the  molecular  constitution  of  the  free   surfaces 
of  liquids. 

Jour.  Phys.  Chem.  v.  17,  p.   388-389.     My.  '13. 

582  *Gibson,  A.  H.     The  behavior  of  bodies  floating  in  a   free  or 
a  forced  vortex. 

Manchester  Lit.  &  Philos.  Soc.     Memoir  No.  7,  1911.     19  p. 

583  * The  manner  of  motion  of  water  flowing  in  a  curved 

path. 

Manchester  Lit.  &  Philos.  Soc.     Memoir  No.  13,  1911. 

584  Harris,  J.  E.     Some  adsorption  phenomena  in  soils  and  kaolin. 
Jour.  Phys.  Chem.  v.  18,  p.  355-372.     Ap.  '14. 

585  Haultain,  H.  E.  T.  Some  early  notes  on  surface  tension  action 
in  wet  concentration. 

Trans.  Can.  Min.  Inst.  v.  16,  p.  115-136.     1913. 

586  *Jamison,  R.     On  the  film  or  skin  of  warmed  milk  and  other 
proteid   solutions. 

Journal  of  Physiology,  v.  27,  p.  26.     1901-1902. 

587  Kenrick,  Frank  B.    Some  lecture  experiments  on  surface  tension. 
Jour.  Phys.  Chem.  v.  16,  p.  513-518.     Je.  6,  '12.    Illus. 

588  Lewis,  W.  C.  M.    An  experimental  examination  of  Gibbs's  theory 
of   surface-concentration,    regarded   as    the   basis    of   adsorption, 
with  an  application  to  the  theory  of  dyeing. 

Phil.,  Mag.  v.  15,  6  Ser.  p.  499-526.    Ap.  '08;  v.  17,  6  Ser.  p.  466-494. 

Ap.  '09.     Illus. 

From  the  Muspratt  Laboratory  of  Physical  and  Electro-chemistry, 
University  of  Liverpool. 


MISSOURI    SCHOOL    OF    MINES.  49 

589  Miller,  W.   Lash  and  McPherson,  R.  H.     The  behavior  of  col- 
loidal suspensions  with  immiscible  solvents. 

Jour.  Phys.  Chem.  v.  12,  p.  706-716.     D.  '08.     Illus. 

590  Minkowski,  H.     Kapillaritat. 

Encyklopadie  der  Mathematischen  Wissenschaften.     Band  5.     Heft 
4,   p.    558-613.      1907.     Illus. 

591  Mukhopadhyaya,  Jnanendranath.     Coagulation  of  arsenious  sul- 
fide  sol  by  electrolytes. 

Jour.  Amer.  Chem.  Soc.  v.  37,  p.  2024-2031.     S.  '15. 

592  Newman,  F.  R.     Experiments  on  emulsions. 
Jour.  Phys.   Chem.  v.   18,  p.   34-54.     Ja.  '14. 

593  Nicolai,  G.    Zur  Klarung  von  Erzaufbereitungsabwassern. 
Beitrage  zur  Entwicklung  der  mechanischen  und  neuere  Erfahrungen 
auf    dem    Gebiete    der   mechanisch-chemischen    Aberwasserklarung 
unter  besonderer  Beriicksichtigung  von  Bleierzaufbreitung. 

Metall  und  Erz.  v.  12   (N.  F.  Ill),  p.  135-140;   155-162.     1915.     Illus. 

594  Noyes,  Arthur  A.     The  preparation  and  properties  of  colloidal 
mixtures. 

Jour.  Amer.  Chem.  Soc.  v.  27,  p.  85-104.;    F.  '05. 
A  general  discussion  for  students. 

595  The  preparation  and  properties  of  colloidal  mixtures. 

Pop.  Sci.  M.  v.  67,  p.  268-279.     Jl.  '05. 

596  Oil  films  on  water. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  156.     Jl.  31,  '15. 

597  Pape,  W.  A.   C.     Why  do  many  solids  float  on  their  liquids? 
Metl.  &  Chem.  Engng.  v.  10,  p.  392.     Jl.  '12. 

598  Pockels,  Agnes.     Uefcer  das  spontane  Sinken  der  Oberflachen- 
spannung  von   Wasser,   wasseringen   Losungen   und  Emulsionen. 

Annalen  der  Physik.   IV.   8  Band.  p.  854-871.    Jl.  02. 

599  Quincke,  G.     Die  Bedeutung  der  Oberflachenspannung  fur  die 
Photographic  mit  Bromsilbergelatine  und  eine  neue  Wirkung  des 
Lichtes. 

Annalen  der  Physik.     IV.   Folge.     11  Band.     p.   1100-1120.     Jl.  '03. 

600  Die  Messungen  des  Hrn.  Gallenkamp  mit  Adhasion- 
splatten. 

Annalen    der   Physik.     IV.    Folge.      10   Band.     p.    453-456.     Ja.    '03. 

601  Niederschlagmembranen     und    Zellen    in     Gallerten 
oder  Losungen  von  Leim,  Eiweisz  und  Starke. 

Annalen  der  Physik.     IV.  Folge.     11   Band.     p.   449-488.     Je.   '03 

602  -    Die  Oberflachenspannung  an  der  Grenze  von  Alkohol 
mit  wasserigen   Salzlosungen.     Bildung  von  Zellen,   Spharokrys- 
tallen  und  Krystallen. 

Annalen  der  Physik.    IV.  Folge.     9  Band.    p.  1-43.    Ag.  '02. 


50  MISSOURI    SCHOOL   OF    MINES. 

603  Die  Oberflachenspannung  an  der  Grenze  wasseriger 
Kolloidlosungen  von  verschiedener  Koncentration. 

Annalen  der  Physik.  IV.  Polge.  9  Band.  p.  793-836.  N.  '02;  p. 
969-1045.  D.  '02.  Illus.;  10  Band.  p.  478-521.  F.  '03;  p.  673-703. 
Mr.  '03. 

604  Oberflachenspannuug    und    Zellenbildung   bei    Leim- 
tannatlosungen. 

Annalen  der  Pbysik.    IV.  Folge.     11  Band.    p.  54-95.    Ap.  '03. 

605  Die   schaumstrukture  des   schwefels  und   deren  ein- 
flusz  auf  doppelbrechung,  dichroismus,   elektrische  eigenschaften 
und  kristallbilclimg. 

Annalen  der  Physik.     IV.  Folge.     26  Band.     p.  625-711.     Jl.  28,  '08. 

606  Ueber  kolloidale  Losungen. 

Annalen  der  Physik.    IV.  Folge.     12  Band.     p.  1165-1168.     N.  '03. 

607  Ueber  die  Klarung  truber  losungen. 

Annalen  der  Physik.     IV.  Folge.     7  Band.     p.  57-96.     D.  '01. 

608  Ueber    unsichtbare    Fliissigkeitsschichten    und    die 
Oberflacnenspannung    fliissiger    Niederschlage    bei    Niederschlag- 
membranen,  Zellen,  Colloiden  und  Gallerten. 

Annalen  der  Physik.  IV.  Folge.  7  Band.  p.  631-682.  Mr.  '02; 
p.  701-744.  Ap.  '02. 

609  ^Ranisden,  W.     Die  coagulirung  von  eiweisskorpern  auf  mech- 
anis^hem  wege. 

Archiv  fiir  Anatomic  u.  Physiologic.  Physiologische  abtheilung. 
1894.  p.  517-534. 

610  Separation  of  solids  in  the  surface-layers  of  solutions 
and  "suspensions."     Observations  on  surface-membranes,  bubbles, 

*  emulsions,  and  mechanical   coagulation.      (Preliminary   account). 

Chem.  News.  v.  88,  p.  49-51.     Jl.  31,  '03. 

611  Rayleigh,  Lord.    Investigations  in  capillarity.    The  size  of  drops. 
The  liberation  of  gas  from  supersaturated  solutions.     Colloiding 
jecs.    The  tension  of  contaminated  water-surfaces. 

Phil.  Mag.  v.  48,  p.  321-337.    O.  '99. 

612  On  the  superficial  viscosity  of  water. 
Roy.  Soc.  Proc.  v.  48,  p.  127-140.     Je.  '90.     Illus. 

613  Richardson,  Clifford.     A  unique  geophysical  phenomenon,  trini- 
idad   asphalt,   interesting   from   the   point   of   view   of   dispersoid 
chemistry. 

Jour.  Phys.  Chem.  v.  19,  p.  241-249.     Mr.  '15. 

614  Sulman,  H.  L.     New  discoveries  in  the  physics  of  ore  flotation. 
(In  Presidential  address.) 

Instn.  Min.  &  Metl.  Bulletin  No.  79,  p.  9-17.    Ap.  19,  '11. 

615  Suspension  colloids. 

Min.  &  Sci.  Pr.  v.  106,  p.  209.     F.  1,  '13- 


MISSOURI    SCHOOIv   OF    MINES.  51 

616  Swinburne,  J.,  and  Rudorf,  G.    The  physics  of  ore  flotation. 
Eng.  &  Min.  Jour.  v.  81,  p.  276-277.    F.  10,  '06. 

Min.  &  Sci.  Pr.  v.  92,  p.  126-127.     F.  24,  '06. 

Abstract  of  a  paper  read  before  the  Faraday  Society,  D.  12,  '05. 

617  Washburne,  C.  W.     The  capillary  concentration  of  gas  and  oil. 
Bull.  Am.  Inst.  Min.  Engrs.,  1914.    p.  2365-2378. 

Discussion"  appears  in  Bull.  Am.  Inst.  Min.  Engrs.  1915.  p.  831-846. 

LITIGATION 

618  Argument  in  flotation  processes  and  composition  of  the  court. 
English  interests  in  Ontario,  and  new  companies. 

Min.  &  Sci.  Pr.  v.  108,  p.  389.     F.  28,  '14. 

619  *British  Ore  Concentration  Syndicate  Ltd.  vs.  Minerals  Separa- 
tion Ltd. 

Aust.  Min.  Stand  v.  42,  p.  687.  1909. 

620  Croasdale,  Stuart.    Why  is  the  patent  mania? 
Eng.  &  Min.  Jour.  v.  99,  p.  744-745.     Ap.  24,  '15. 

621  Decision  in  Elmore   flotation   patents. 
Eng.  &  Min.  Jour.  v.  88,  p.  1118.     D.  4,  '09. 

622  Decisions  in  flotation  litigation. 

Min.  &  Sci.  Pr.  v.  108,  p.  759-761.     My.  9,  '14. 

^» 

623  Decision  in  the  flotation  litigation.  *        .       - 
Eng.  &  Min.  Jour.  v.  96,  p.  229.     Ag.  2,  '13. 

624  The  Elmore  flotation  process.     The  specifications  showing  the 
original  claims  for  the  patents  on  which  the  process  is  based. 

Mines  &  Min.  v.  32,  p.  124-125,    S.  '11. 

625  Elmore  oil  process  patent  decision. 
Eng.  &  Min.  Jour.  v.  86,  p.  321.    Ag.  15,  '08. 

626  Flotation. 

Min.  Mag.  v.  9,  p.  426-427.     D.  '13. 

627  Flotation  again. 

Min.  Mag.  v.  13,  p.  69-70.     Ag.  '15. 

628  Flotation  and  the  patent  law. 

Min.  &  Sci.,  Pr.  v.  109,  p.  586.     O.  17,  '14. 

629  Flotation  companies  unite.     Broken  Hill  concentration. 
Min.  &  Sci.  Pr.  v.  104,  p.  637.    My.  4,  '12. 

630  Flotation  litigation. 

Min.  Mag.  v.  10,  p.  168-170.    Mr.  '14;  p.  406-407.    Je.  14. 
Eng.  &  Min.  Jour.  v.  97,  p.  579.     Mr.  14,  '14;  p.  673.     Mr.  28,  '14;  p. 
973-974.     My.  9,  '14. 

631  Flotation  litigation  and  possible  results. 
Min.  &  Sci.  Pr.  v.  107,  p.  903.    D.  6,  '13. 


52  MISSOURI    SCHOOIv   OF    MINKS. 

632  Flotation  litigation,   Elmore  vs.   The   Sulphide   Corporation   de- 
cision. 

Min.  &  Sci.  Pr.  v.  108,  p.  343-344.    Mr.  28,  '15. 

633  The  notation  patent  litigation. 

Eng.  &  Min.  Jour.  v.  97,  p.  679.     Mr.  28,  '14. 

634  Flotation  patents. 

Min.  Mag.  v.  1,  p.  261-268;  p.  289-290.  D.  '09.  v.  2,  p.  301.  Ap.  '10, 
Eng.  &  Min.  Jour.  v.  97,  p.  1067-1068.  My.  23,  '14. 

635  The  notation  process. 

Eng.  &  Min.  Jour.  v.  91,  p.  745-74G.  Ap.  15,  '11,  v.  97,  p.  969.  My.  9, 
'14;  v.  99,  p.  253.  Ja.  30,  '15. 

636  Flotation  process  litigation. 

Min.  Jour.  v.  101,  p.  418.     My.  10,  '13;  v.  103,  p.  1079.  N.  15,  '13;  v. 

105,  p.  445.     My.  9,  '14. 
Eng.  &  Min.  Jour.    v.  83,  p.  865.     My.  4,  '07;   v.  86,  p.  778.     O.  17, 

'08;   v.  87,  p.  216.     Ja.  23,  '09;  v.  96,  p.  277.     Ag.  9,  '13;   v.  98,  p. 

710,  0. 17,  '14. 

637  Flotation,  process   litigation.     Ore   Concentration   Co.     Ltd.   v. 
Sulphide  Corporation.     Full  text  of  judgment. 

Aust.  Min.  Stand,     v.  46,  p.  108.     Ag.  3,  '11. 

638  Flotation  processes. 

Minr.  Ind.    v.  22,  p.  838-843.     1913. 

639  Flotation  suit. 

Metl.  &  Chem.  Engng.    v.  13,  p.  409-411.    Jl.  '15. 

640  Hyde,  James  M.    Flotation  and  the  patent  law. 
Min.  &  Sci.  Pr.  v.  109,  p.  728.     N.  7,  '14. 

641  Litigation. 

Min.  &  Sci.  Pr.  v.  99,  p.  766.    D.  4,  '09. 

642  Minerals  Separation  Ltd. 

Aust.  Min.  Stand,  v.  51,  p.  125.    F.  12,  '14. 

643  Minerals  Separation  Co.  sues. 

Eng.  &  Min.  Jour.  v.  92,  p.  1172.    D.  16,  '11. 

644  The  Minerals  Separation  decision. 
Can.  Min.  Jour.  v.  35,  p.  340.    My.  15,  '14. 

645  Minerals  Separation  suit  at  Butte,  Mont. 
Metl.  &  Chem.  Engng.  v.  11,  p.  309.     Je.  '13. 

646  Minerals  Separation  vs.  Elmore. 
Eng.  &  Min.  Jour.  v.  87,  p.  38,  Ja.  2,  '09. 

647  Minerals  Separation,  Ltd.  vs.  James  M.  Hyde. 
Min.  &  Sci.  Pr.  v.  107,  p.  270-272.    Ag.  16,  '13. 

Min.  Jour.  v.  102,  p.  738.    Ag.  2,  '13;  p.  800.    Ag.  23,  '13. 

Min.  Mag.  v.  10,  p.  188-189.     Mr.  '14. 

Eng.  &  Min.  Jour.  v.  96,  p.  317-318.    Ag.  16,  '13. 


MISSOURI    SCHOOL   OF    MINKS.  53 

648  *Minerals  Separation  Ltd.  vs.  Potter. 
Aust.  Min.  Stand,  v.  42,  p.  38.     1909. 

649  Minerals  Separation  vs.  Ore  Concentration  (1905). 
Min.  Jour.  v.  85,  p.  649.     My.  22,  '09. 

650  More  flotation  litigation. 

Eng.  &  Min.  Jour.  v.  98,  p.  222.     Ag.  1,  '14. 

651  More  flotation-process  litigation. 

Eng.  &  Min.  Jour.  v.  83,  p.  675.     Ap.  6,  '07. 

652  More  "Process"  litigation.     Ore  Concentration  Co.    (1905)   Ltd. 
vs.  Sulphide  Corporation  Ltd. 

Aust.  Min.  Stand,  v.  45,  p.  539-540.    Je.  1,  '11. 

653  Norris,  Dudley  H.    Flotation — A  paradox. 
Min.  &  Sci.  Pr.  v.  Ill,  p.  955-958.     D.  25,  '15. 

654  Oil  flotation. 

Min.  Jour.  v.  106,  p.  624-625.    Jl.  4,  '14. 

655  Oil  process  litigation. 

Min.  &  Sci.  Pr.  v.  97,  p.  G60-661.     N.  14,  '08. 

656  The  Ore  Concentration  Co.   (1905). 
Eng.  &  Min.  Jour.  v.  88,  p.  130.     Jl.  17,  '09. 

657  Ore  Concentration  Co.   (1905)  Ltd.     The  Elmore  patents  litiga- 
tion. 

Aust.  Min.  Stand,  v.  47,  p.  78.     Ja.  25,  '12. 

658  Patent  rights  in  oil  separation  processes.  .The  Minerals  Separa- 
tion, Ltd.     (Appellants)  vs.  The  British  Ore  Concentration  Syndi- 
cate and  A.  S.  Elmore  (Respondents). 

Min.  Jour.  v.  87,  p.  314-316.    N.  20,  '09. 

659  Patent  rights  in  oil  separation  processes.     The  British  Ore  Con- 
centration Syndicate,  Ltd.  vs.  Minerals  Separation  Ltd. 

Min.  Jour.  v.  84,  p.  220.     Ag.  15,  '08. 

660  Potter  and  Delprat  processes. 

Eng.  &  Min.  Jour.  v.  83,  p.  389.  F.  23,  '07. 

661  *Potter  Sulphide   Ore   Treatment   Co.   vs.   Minerals   Separation 
Ltd. 

Aust.  Min.  Stand,  v.  41,  p.  678.    1909. 

662  Potter's  sulphide  treatment. 

Min.  &  Sci.  Pr.  v.  96,  p.  42.     Ja.  4,  '08. 

663  Process  litigation. 

Min.  Jour.  v.  100,  p.  136.     F.  8,  '13;  p.  962.     O.  11,  '13. 

G64  Process  litigation.    Minerals  Separation  case. 

Aust.  Min.  Stand,  v.  51,  p.  208.     Mr.  12,  '14. 

665  Progress  of  flotation  litigation. 

Min.  &  Sci.  Pr.  v.  108,  p.  642-643.    Ap.  18,  '14. 


54  MISSOURI    SCHOOL    OF    MINES. 

666  Rival  flotation  processes. 

Min.  &  Sci.  Pr.  v.  97,  p.  344.     S.  12,  '08. 

667  Scott,   Walter   A.     Air-froth   flotation.     A  legal   version   of  the 
technology  of  the  process. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  583-589.     O.  16,  15.    Illus. 

668  Shellshear,  Wilton.     Minerals  Separation  vs.  Debavay  process. 
Min.  &  Sci.  Pr.  v.  107,  p.  21.     Jl.  5,  '13. 

669  The  slime-filtering  decision. 

Eng.  &  Min.  Jour.  v.  94,  p.  917-918.     N.  16,  '12. 

670  The  status  of  flotation  litigation. 

Min.  &  Sci.  Pr.  v.  Ill,  p.  917-918.     D.  18,  '15. 

671  Sweeping  decision  in  flotation  litigation. 
Metl.  &  Chem.  Engng.  v.  12,  p.  362-363.     Je.  '14. 

672  Walker,  Edward.     Flotation  process  litigation. 
Min.  &  Sci.  Pr.  v.  98,  p.  G2.     Ja.  9,  '09. 

673  Flotation   processes   during   1913. 
Min.  &  Sci.  Pr.  v.  108,  p.  79-80.     Ja.  3,  '14. 

674  Wolf,  J.  D.     Flotation  patents. 

Min.  &  Sci.  Pr.  v.  105,  p.  832.    D.  28,  '12. 

675  Zinc    Corporation. — Battle    of    the    processes. — The    Elmore    oil 
process. 

Min.  &  Sci.  Pr.    v.  94,  p.  651-652.     My.  25,  '07. 

676  Zinc  Corporation  and  the  flotation  processes. 
Eng.  &  Min.  Jour.  v.  91,  p.  1198.    Je.  17,  '11. 

677  Zinc  process  litigation. 

Min.  Jour.  v.  95,  p.  1256.     D.  23,  '11. 


MISSOURI    SCHOOL    OF    MIN^S.  55 

PATENTS 

In  the  comparatively  short  space  of  twelve  years  (June,  1912) 
about  500  patents  for  flotation  processes,  or  apparatus  in  connection 
with  them,  have  been  applied  for.  All  of  them  without  exception 
are  based  upon  the  difference  in  the  relations  between  ores  and 
gangues  to  the  surface  tension  of  water.  From  the  theoretical  point 
of  view,  the  only  distinction  between  the  various  processes  consists 
in  the  means  adapted  to  raise  the  ore  particles  to  the  surface,  but 
in  the  particular  working  of  the  various  apparatus  and  plans  there 
are  some  substantial  differences.  The  important  British  and  United 
States  patents  are  chronologically  arranged  below. 

GREAT    BRITAIN. 

678  G.  Robson,  Dolgelley,  and  S.  Crowder,  London,  Eng.     Separat- 

ing ores  from  finely  divided  gangue  by  adding  soapy  water  and  a 
hydrocarbon.    No.  2,538  of  1895. 

670  Ore  Treatment.     F.  E.  Elmore,  Leeds.     Using  a  heavy  oil  for 

catching    the    metallic    constituents    of    ore,    while    the    gangue    is 
washed  away  by  the  water.    No.  21,948  of  1898. 

680  Concentrator. — A.    S.    Elmore,    London.      Modifications    in    the 
plans  used  in  the  inventor's  system  of  concentrating  ores  with  oil. 
No.  15,526  of  1901. 

681  Sulphide    Ore    Treatment. — C.    V.    Potter,    Victoria,    Australia. 
Treating  fine  ground  sulphide  ores  with  a  weak  solution  of  sulphuric 
acid  and  heat,  so  causing  metallic  compounds  to  float  on  the  sur- 
face and  separate  from  the  gangue.    No.  1,146  of  1902. 

682  Concentrator. — H.  E.  T.  Haultain  and  H.  R.  Stovel,  Nelson,  B. 
C.    A  plant  for  concentrating  ores  by  the  addition  of  oil  to  the  pulp. 
No.  9,521  of  1902. 

683  Concentration  by  Oil. — A.  Froment,  Traversella,  Italy.     In    sep- 
aration of  ores  by  oil  concentration,  the  addition  of  substances  to 
generate  gas  which  makes  the  separation  more  rapid.     No.  12,778 
of  1902. 

684  Oil  Concentration. — J.  B.  Schammell,  London.     Using  oil,  con- 
taining a  small  quantity  of  chloride  of  sulphur,  for  catching  metallic 
particles  out  of  ore.     No.  15,280  of  1902. 

685  Treating  Sulphide  Ores.— G.  D.  Delprat,  Broken  Hill,  N.  S.  W. 
Separating  sulphides  from  gangue  by  immersing  the  finely  ground 
ore  in  a  hot  solution  of  bisulphate  of  soda,  the  sulphides  thereon 
rising  to  the  surface  and  the  gangue  falling  to  the  bottom.     No. 
26,279  of  1902. 

686  Treating  Zinc-Bearing  Tailings G.  D.  Delprat,  Broken  Hill,  N. 

S.  W.     Throwing  zinc  tailings  into  an  acid  solution  of  nitrate  of 
soda,  the  sulphides  being  carried  to  the  top  by  the  gas  generated 
and  the  gangue  falling  to  the  bottom.    No.  26,280  of!  1902. 


56  MISSOURI    SCHOOL   OF    MINES. 

687  Separating  Ores. — A.  E.  Cattermole,  London.     Separating  ores 
from  gangue   by  first  immersing  in  an  emulsion  of  oil,  soap  and 
water,  the  proportion  of  oil  being  very  small,  so  that  the  metallic 
particles  do  not  float  but  sink  with  the  gangue,  and  afterwards  sep- 
arating the  metallic  particles  by  mechanical  classifiers.     No.  26,295; 
26,296  of  1902. 

688  Oil  Concentration. — A.  S.  Elmore,  London.     In  the  oil  concen- 
tration process,  arrangements  for  working  without  access  of  air  so 
as  to  adapt  the  process  to  the  treatment  of  tellurides  and  other 
easily  oxidizing  ores.     No.  184  of  1903. 

689  Separating  Zinc  Sulphides. — G.  A.  Goyder  and  E.  Laughton,  Ade- 
laide, South  Australia.     Separating  zinc  sulphide  from  tailings  by 
passing  into  water  slightly  acidulated  with  sulphuric  acid,  which 
generates  gas  around  the  sulphide  and  so  causes  it  to  rise  to  the 
surface  while  the  gangue  falls  to  the  bottom.     No.  16,839  of  1903. 

690  Separating  Sulphides. — A.  E.  Cattermole,  H.  L.  Sulman  and  H. 
K.  Picard,  London.     The  use  of  fatty  acids  or  resin  acids  for  sep- 
arating sulphides  from  gangue  suspended  in  water.     No.  17,109  of 
1903. 

691  Oil  Concentration. — A.  E.  Cattermole,  London.     A  method  of  oil 
concentration,  using  a  small  amount  of  saponified  oil  and  separat- 
ing the  mineral  from  the  gangue  by  jigging.    No.  18,589  of  1903. 

692  Sulphide  Recovery  from  Tailings. — G.  D.  Delprat,  Broken  Hill, 
N.   S.  W.,  Australia.     Improvements  in  the  inventor's  process  for 
recovering  sulphides  from  tailings,  by  passing  them  into  a  bath  of 
bisulphate  of  soda.    No.  19,783  of  1903. 

693  Oil  Concentration.— Sulman   &  Picard,  London.     In  separating 
minerals  from  gangue  by  oil  concentration,  introducing  the  oil  in 
the  form  of  a  vapor  mixed  with  jets  of  air.    No.  20,419  of  1903. 

694  Ore  Treatment.— G.  D.  Delprat,  Broken  Hill,  New  South  Wales. 
Method  of  making  sulphides  rise  to  the  surface  in  a  solution  of 
common  salt  containing  2  per  cent  sulphuric  acid.     No.  27,132  of 
1903. 

695  Oil  Concentration. — J.  D.  Wolf,  London.     Passing  ores  through 
petroleum  mixed  with  other  oils  and  chloride  of  sulphide,  and  aft- 
erwards removing  any  gangue  taken  up  by  passing  through  warm 
water.    No.  4,793  of  1904. 

696  Slime  Deposition. — H.  L.  Sulman  and  H.  F.  K.  Picard,  London. 
Collecting  up  slimes  and  depositing  them  by  adding  small  amounts 
of  soapy  matter  to  the  solutions.     No.  13,481  of  1904. 

697  Concentration. — J.    D.   Wolf,    London.     A    concentrator   of   the 
traveling  belt  type,  in  which  the  mineral  particles  are  separated 
from  the  gangue  by  means  of  a  greasy  surface  on  the  belt,  and  not 
by  concussion  or  gravity.     No.  17,407  of  1904. 


MISSOURI    SCHOOL   OF    MINES.  57 

698  Ore  Separation. — F.  E.  Elmore,  London.     The  use  of  a  vacuum 
for  increasing  the  efficiency   of   the  process   for  floating  metallic 
sulphides  by  means  of  bubbles  of  air  or  gas,  and  thus  separating 
them  from  gangue.     No.  17,816  of  1904. 

699  Ore    Separation. — A      Debavay,     Melbourne,     Australia.     Sepa- 
rating blende  from  gangue  in  zinc  tailings  and  concentrate,  by  mak- 
ing use  of  surface  tension  of  water;  the  tailing  is  passed  gently  upon 
the  surface  of  water,  the  surface  tension  being  sufficient  to  sup- 
port the  blende  but  not  the  gangue.    No.  18,660  of  1904. 

700  Separating  Sulphides   from  Gangue. — J.  H«  Gillies,   Melbourne, 
Victoria.     In  separating  sulphides  from  gangue  by  the  "saline  pro- 
cess,"  improved   apparatus   for   introducing   the   material   into   the 
vats.     No.  20,159  of  1904. 

701  Oil  Concentration. — A.   Schwarz,  New  York,  U.  S.  A.     Adding 
fatty  substances  to  petroleum,  and  also  sulphur  compounds,  in  order 
to  increase  the  efficiency  of  the  process  for  concentrating  ores  by 
means  of  oil.    No.  23,906  of  1904. 

702  Sulphide  Separation. — A.  P.  S.  Macquisten,  Glasgow.     This  in- 
vention relates  to  the  separation  of  metallic,  sulphides  from  gangue 
by  flotation.    The  inventor  uses  a  traveling1  belt  which  continuously 
passes  into  and  out  of  water.    As  the  belt  goes  into  and  out  of  the 
water,  the  particles  of  sulphide  are  floated  off,  leaving  nothing  but 
gangue  on  the  belt.    No.  25,204  and  25,204A  of  1904. 

703  Ore  Separation. — A.  J.  F.  Debavay,  Melbourne,  Victoria.     Appa- 
ratus to  be  used  in  bringing  thin  films  of  ores  on  the  surface  of 
water,  by  means   of  which  the  metallic  particles  are  floated  and 
the  gangue  sinks.    No.  25,858  of  1904. 

704  Concentrating  Machine. — F.  E.  Elmore,  London.     Apparatus  in 
which  to  conduct  the   inventors  process   for   conducting  flotation- 
concentration  under  a  vacuum.    No.  29,282  of  1904. 

705  Ore  Separation. — H.  L.  Sulman,  H.  F.  K.  Picard,  and  J.  Ballot, 
London.    The  application  of  surface  tension  of  water  for  supporting 
mineral  particles  with  oily  surfaces.    No.  29,374  of  1904. 

706  Concentrating  Ore. — Sulman,  Picard  and  Ballot,  London.     The 
inventors  add  a  small  proportion  of  alkali,  soapy  matter,  or  other 
substances  that  diminish  the  surface  tension  of  water,  to  the  water 
used  in  grading,  vanning  or  huddling  ores,  the  addition  being  for 
the  purpose  of  increasing  the  efficiency  of  the  separation.    No.  1821 
of  1905. 

707  Flotation  Process Sulman,  Picard  and  Ballot,  London.    A  modi- 
fication   of   the    flotation    process    for    separating    sulphides    from 
gangue,  consisting  in  bringing  dry  powdered  ore  on  to  the  surface 
of  acidified  water,  the  metallic  particles  floating  andi  the  gangue 
falling.     No.  5260  of  1905. 


58  MISSOURI    SCHOOL    OF    MINES. 

708  Separation   of  Sulphides. — A.   S.   Elmore,   London.     In  flotation 
processes  for  separating  sulphides  from  gangue,  adding  to  the  liquid 
a  soluble  chloride  as  calcium  chloride,  together  with  a  small  portion 
of  free  hydrochloric  acid.     No.  5,953  of  1905. 

709  Flotation    Process. — A.    P.    S.    Macquisten,    Glasgow.     Improve- 
ments in  the  inventor's  flotation  process   for  separating  minerals, 
consisting  of  the   addition   of   minute   quantities   of  fatty  acids   to 
the  water.     No.  15,119  of  1905. 

710  H.  L.  Sulman,  London.     Conducting  the  process  of  flotation  of 
sulphides  by  means  of  oil  at  the  boiling  point  of  the  floating  solu- 
tion.    No.  19,709  of  1905. 

711  Concentrator — R.  E.  Saunders,  London.    A  pneumatic  apparatus 
for  separating  gangue  from  mineral,  consisting  of  a  series  of  baffle 
plates,  against  which  the  ore  is  drawn  by  suction.     No.   21,398  of 
1905. 

712  Flotation  Process. — H.  L.  Sulman,  H.  F.  K.  Picard  and  J.  Ballot, 
London.     Improvements  in  the  inventor's  flotation  process  for  sep- 
arating certain  metallic  compounds  from  gangue,  with  the  object  of 
more  equally  wetting  the  various  constituents  of  the  ore.    No.  26,711 
of  1905. 

713  Concentration  Process.— H.  L.  Sulman,  H.  F.  K.  Picard  and  J. 
Ballot,  London.    In  the  inventor's  process  for  floating  minerals  from 
gangue  in  a  saponified  oily  medium,  subjecting  the  mixture  to  at- 
mospheric pressure  and  subsequently  relieving  it,  thereby  releasing 
gaseous  bubbles,  which  carry  up  the  mineral.    No.  26,712  of  1905. 

714  Ore  Dressing. — Concentrating  table.     H.  L.  and  E.  A.  Sulman, 
London,   England.      A   form   of   bubble    or   concentrating   table    on 
which  the  material  to  be  treated  is  periodically  rolled  over  by  a 
squegee  so  that  the  action  of  the  water  running  down  the  surface 
may  be  more   effective   in  floating  off  the   lighter   particles.     No. 
9,981  of  1906. 

715  Flotation  Process.— G.  A.  Chapman,  Broken  Hill,  N.  S.  W.     Im- 
provements in  tne  Sulman-Picard-Ballot  process  for  flotation  of  sul- 
phides by  adding  fatty  acids  and  agitating  in  water,  consisting  in 
adding  to  the  ore  acidified  water  in  one  vat  and  adding  the  fatty 
matter  subsequently  in  another  vat.    No.  17,328  of  1906. 

716  Flotation  Processes. — H.  L.  Sulman,  London,  Eng.     In  flotation 
processes  for  separating  ores  from  gangue  in  which  the  ore  is  ex- 
posed alternately  to  the  action  of  air  and  water,  slightly  warming 
the  liquid  in  which  the  flotation  takes  place.    No.  19,944  of  1906. 

717  Separation   Process. — Improvements   in  apparatus   for  more  or 
less  completely  separating  subdivided  solid  matter  from  a  liquid. 
Particularly  applicable  for  thickening  ore  pulp  and  for  feeding  or 
measuring  the  pulp  or  solid.     Francis  E.  Elmore  and  Alexander  F. 
Elmore,  London.     No.  26,821  of  1907. 


MISSOURI    SCHOOL    01?    MIN^S.  59 

718  Ore    Treatment. — Improvements    relating    to    the    treatment    of 
ores  or  the  like.     A.  A.  Lockwood  and  M.  R.  A.  Samuel,  London, 
E.  C.     No.  12,962  of  1908. 

719  Concentration. — Improvements    in    or    relating   to    the    concen- 
tration of  ores.     Arthur  H.  Higgins,   Broken  Hill,,  N.   S.  W.     No. 
26,352  of  1908. 

720  Concentration. — Improvements  in  or  relating  to  the  concentra- 
tion of  ores.    H.  L.  Sulman  and  H.  F.  K.  Picard,  London,  England. 
No.  28,173  of  1908. 

721  Flotation  Process. — Improvements  in  and  relating  to  the  sepa- 
ration of  zinc  blende  and  other  metalliferous  constituents  from  ore 
concentrates  and  slimes  by  flotation  or  granulation.    Edward  J.  Hor- 
wood,  Broken  Hill,  N.  S.  W.,  Aust  No.  1,789  of  1909. 

722  Ore    Treatment. — Improvements   relating   to   the   treatment   of 
ores  or  the  like.    A.  A.  Lockwood  and  M.  R.  Anthony  Samuel,  Lon- 
don.   No.  16,229  of  1909. 

723  Concentration. — Improvements  in  the  concentration  of  oxidized 
ores.     H.  L.  Sulman  and  H.  F.  K.  Picard,  London,  Eng.     No.  26,019 
of  1909. 

724  Concentration. — Improvements  in  or  relating  to  the  concentra- 
tion of  ores.     H.  L.  Sulman,  A.  H.  Higgins  and  J.  Ballot,  London, 
Eng.     No.  28,933  of  1909. 

725  Concentration. — Improvements  in   or  relating  to  apparatus  for 
ore  concentration.     T.  J.  Hoover,  London,  Eng.     No.  6,896  of  1910. 

726  Separation. — Improvements  in  the  selective  separation  of  met- 
als from  complex'  ores  or  products.     Henry  L.  Sulman  and  Hugh  K. 
Picard,  London,  Eng.     No.  8650  of  1910. 

727  Concentration. — Improvements  in  or  relating  to  ore  concentra- 
tion.   T.  J.  Hoover,  London,  England.    No.  10,929  of  1910. 

728  Separation. — Improvements  in  or  relating  to  the  separation  of 
ores  or  the  like.     Murex  Magnetic  Co.,  Ltd.,  and  Alfred  A.  Lock- 
wood,  London,  Eng.    No.  13,009  of  1910. 

729  Zinc. — Improved  treatment  of  siliceous  zinc  ores.     F.  B.  Dick, 
Hampton,  Middlesex.    No.  17,735  of  1910. 

730  Concentration. — Improvements  in  or  relating  to  the  concentra- 
tion of  copper  ores.    Henry  H.  Greenway,  Melbourne,  Australia.    No. 
18,943  of  1910. 

731  Concentration. — Improvements  in  or  relating  to  the  concentra- 
tion of  ores.    H.  H.  Greenway,  Melbourne,  Australia.    No.  21,856  and 
12,857  (?)  of  1910. 

732  Concentration. — Improvements  in  or  relating  to  the  concentra- 
tion of  ores.    H.  H.  Greenway,  Melbourne,  Aust.,  and  Henry  Lavers, 
Broken  Hill,  N.  S.  W.    No.  22,973  of  1910, 


60  MISSOURI    SCHOOL    OF    MINES. 

733  Concentration. — Improvements  in  or  relating  to  ore  concentra- 
tion.    Henry  Lavers,  Broken  Hill,  N.   S.  W.,  Minerals   Separation, 
Ltd.,  and  E.  H.  Nutter,  Lond,  Eng.    No.  23,870  of  1910. 

734  Concentration. — Improvements    in    or   relating   to   method    and 
apparatus  for  ore  concentration.     E.  H.  Nutter  and  Minerals  Sepa- 
ration, Ltd.,  London,  Eng.     No.  23,949  of  1910. 

735  Concentration. — Improvements  in  or  relating  to  ore  concentra- 
tion.   E.  H.  Nutter,  London,  Eng.    No.  2,383  of  1911. 

736  Ore  Treatment.— Improvements  in  the  Treatment  of  Ores.     Mu- 
rex  Magnetic   Co.  and  A.  A.   Lockwood,  London,  Eng.     No.   13,208 
of  1911. 

737  Magnetic  Separation. — Improvements  in  or  relating  to  the  sep- 
aration of  ores  or  the  like.     Murex  Magnetic  Co.,  Ltd.,  and  A.  A. 
Lockwood,  London,  Eng.     No.  18,189'  of  1911. 

738  Magnetic  Separation. — Improved  process  for  the  magnetic  prep- 
aration or  oiling  of  ores  or  the  like  and  apparatus  therefor.    Murex 
Magnetic  Co.,  Ltd.,  and  A.  A.  Lockwood,  London,  Eng.     No.  25,469 
of  1911. 

739  Concentration. — Improvements  in  or  relating  to  ore  concentra- 
tion.    G.  A.  Chapman  and  S.  Tucker,  London,  Eng.     No.  28,929  of 
1911. 

740  Concentration. — Improvements  in  or  relating  to  ore  concentra- 
tion.    G.  A.  Chapman  and  S.  Tucker  and  Minerals  Separation,  Ltd., 
London,  England.     No.  14,273  of  1912. 

741  Concentration. — Improvements  in  or  relating  to  apparatus  for 
ore  concentration.    J.  Hebbard,  Broken  Hill,  N,  S.  W.  and  Minerals 
Separation,  Ltd.,  London,  Eng.     No.  15,546  of  1912. 

742  Ore  Concentration. — Improvements  in  or  relating  to  apparatus 
for   concentration.     W.   Broadbridge,   A.    C.   Howard  and   Minerals 

Separation,  Ltd.,  London,  Eng.    No.  25,490  of  1912. 

743  Flotation  Process. — Process  for  treating  sulphide  or  carbonate- 
sulphide  ore  slimes  and  ores  by  flotation.     K.  Schick,  Siegen,  Ger- 
many.    No.  25,689  of  1912. 

744  Concentration. — Method  of  and  apparatus  for  concentrating  ore 
and   the   like.     G.    S.   A.   Appelqvist   and   O.  E.    Tyden,   Stockholm, 
Sweden.     No.  402  of  1913. 

745  Selective    Separation    of    Ores. — A.    H.    Higgins    and    Minerals 
Separation  Limited.     A  process  for  the  selective  separation  of  dif- 
ferent constituents  of  an  ore  by  flotation  consists  in  the  separate 
treatment  of  products  containing  particles  of  substantially  uniform 
size  or  containing  particles  having  substantially  the  same  rate  of 
fall  in  liquid.     The  factors  of  differential  gaseous  attachment  and 
of  differential  falling  power  in  liquid  are  thereby  utilized,  and  con- 
centrates relatively  high  in  certain  constituents  and  residues  rela- 
tively high  in  others  are  obtained.    The  sized  or  classified  products 


MISSOURI    SCHOOL    OF    MINES.  61 

may  be  treated  by  the  process  described  in  16,141  of  1913,  or  in  the 
apparatus  described  in  21,650  of  1913  (C.  A.  9,782).  The  frothing- 
agent  used  is  preferably  partly  soluble  in  H2O,  such  as  eucalyptus 
oil,  and  is  present  in  very  small  quantity,  more  being  added  during 
the  treatment  if  required.  Acids,  alkalies,  or  soluble  salts  may  be 
present.  Cf.  C.  A.  8,  1562.  No.  1,368  of  1914. 

UNITED    STATES 

746  Process  of  Collecting  the  Floating  Precious  Metal  from  Quartz 
or  Cement-Rock  Tailings. — Alfred  E.  Jones,  of  Newark,   New  Jer- 
sey, assignor  to  himself,  John  T.  Rowland,  and  Robert  Gray,  Jr.,  of 
same  place.     Process   for  collecting  and   obtaining  float-gold  from 
quartz  or  cement-rock  tailings,  which  consists  in,  first,  passing  into 
such  tailings  a  fibrous  pulp;  secondly,  withdrawing  the  fibrous  ma- 
terial  and   the  matter   commingled   therewith;    next,   pressing  the 
water  from  the  same;   and,  finally,  destroying  the  fibrous  material. 
No.  267,351. 

747  Method    of    Saving    Floating    Materials    in    Ore-Separation. — 
Hezekiah  Bradford,  of  Philadelphia,  Pennsylvania.     Method  of  sav- 
ing floating  materials  in  ore-separation,   consisting  in  passing  the 
water  and  floating  materials  along  in  an  open  unobstructed  sheet 
from  the  table   or   separating-machine  with   but  little  agitation  of 
the  water,  thus  preventing  such  materials  from  being  carried  be- 
neath the  surface  and  subsiding,  then  causing  the  water  and  floating 
materials  to  plunge  or  fall  into  a  water-receptacle,  and  then  retain- 
ing said  floating  materials  in  said  receptacle  until  they  lose  their 
floating  power  and  sink.    No.  345,951. 

748  Ore-Slimer. — Edgar  A.   Hockley,   of   Ouray,   Colorado.     An   ore 
separator  or  slimer  consisting  of  a  receiving-tank  provided  with  an 
inclined  screw  conveyor,  a  separating-tank  provided  with  perforated 
pipes  located  at  or  near  its  bottom,  and  a  standpipe  connected  there- 
with, said  tank  being  provided  with  a  top  and  bottom  discharge,  a 
vertically-movable  gate  provided  with  valves  and  floats,  whereby  the 
discharge  of  material  from  the  tank  is  automatically  regulated,  and 
a  suitable  filtering-tank,  the  three  tanks  being  arranged  and  con- 
nected substantially  as  and  for  the  purpose  set  forth.     No.  466,753. 

749  Method  of  and  Apparatus  for  Separating  Slime  or  Fines  from 
Water  Used  in  Milling  Ores. — Albion  M.  Rouse,  of  Boulder,  Colorado, 
assignor  to   George  R.  Williamson,  of   same  place.     An  improved 
method    consisting  in  depositing  the  mill-tailings  into  a  receptacle 
through  which  there  is  an  upward  flow  of  water,  then  carrying  the 
water  and  tailings  through  a  chamber,  and  causing  an  upward  flow 
of  air  through  the  body  of  water  and  tailings,  forming  a  scum.    No. 
469,599. 

750  Process  of  Concentrating  Ores. — Charles  B.  Hebron  and  Carrie 
J.  Everson,  of  Denver,  Colorado.     A  process  for  concentrating  ores, 
which  consists  in  first  joining  the  metallic  and  mineral  particles 
in  the  pulverized  ore  with  a  quantity  of  buoyant  material    and  then 
sifting  or  blowing  the  prepared  ore  while  in  a  dry  state  upon  the 


62  MISSOURI    SCHOOL   OF    MINES. 

surface  of  liquid,  whereby  the  buoyed  metallic  and  mineral  particles 
are  made  to  float  and  thus  separate  from  the  gangue,  which  settles. 
No.  471,174. 

751  Process  of  Concentrating  Ores. — Charles  B.  Hebron,  of  Denver, 
Colorado,  assignor  of  five-sevenths  to   Carrie  J.  Everson,  of  same 
place,   Mamie  W.  Hutchinson,  of  Topeka,   Kansas,  and  Charles  T. 
Brown,   of   Chicago,   Illinois.      Process    for   concentrating  ore,    con- 
sisting of  producing  by  heat  a  vacuumed  and  expanded  condition 
in  the  mineral  and  metallic  particles  of  the  ore,  of  presenting  to 
such  ore  while  in  a  heated,  vacuumed,  and  expanded  condition,  and 
by  movement  and  pressure  mechanically  joining  with  the  mineral 
and   metallic   particles    thereof    particles    of   buoyant    material,    of 
cooling  and  aerating  such  buoyed  mineral  and  metallic  particles, 
and  of  presenting  such  prepared  ore  stock  to  the  surface  of  liquid, 
so  that  the  buoyed  mineral  and  metallic  particles  of  the  ore  stock 
are  maintained  upon  the  surface  of  such  liquid  for  a  greater  length 
of  time  than  the  rock  matrix  of  the  ore  stock  and  thereby  for  such 
time  separated  therefrom.     No.  474,829. 

752  Method  of  and  Apparatus  for  Separating  Graphite  or  Like  Sub- 
stances from  Crushed  Rock. — Axel.  W.  Nibelius,  of  Hackettstown, 
New   Jersey.      The    process    of   separating    graphite   and    like    sub- 
stances from  the  crushed  rocks,  which  consists  in  causing  a  falling 
body  of  dry  and  crushed  rock  to  meet  a  vertically  and  upwardly 
moving  body  or  stream  of  water  at  the  surface  of  and  within  a  sur- 
rounding body  of  comparatively  still  water,  on  whic'i  surface  the 
flakes  of  graphite  or  other  substance  not  absorbing  water  are  sep- 
arated and  are  floated  off  on  the  overflowing  water,  while  the  water- 
absorbing  particles  are  precipitated  in  the  water.    No.  486,495. 

753  Separation   of  Metals    and   Metallic   Compounds   from   Ores    or 
Other  Substances. — George  Robson,  of  Dolgelly,  England,  assignor 
to  himself,  and  Samuel  Crowder,  of  London,  England.     The  method 
of  recovering   metals   and  metallic  compounds   from   finely-divided 
substances,  which  consists  in  thoroughly  and  mechanically  agitat- 
ing and  mixing  a  fatty  oil  with  said  substances  while  the  same  are 
in  a  moist  or  plastic  state  due  to  admixture  of  water  therewith, 
then  drawing  off  the  fatty  oil,  carry  the  metal  particles,  and  metallic 
compounds  from  said  substances,  and  then  separating  the  metals 
and  metallic  compounds  from  the  oil.     No.  575,669. 

754  Apparatus  for  Separating  Metallic  from  Rocky  Constituents  of 
Ores. — Francis  E.  Elmore,  Leeds,  England.     The  combination  in  an 
apparatus  for  separating  metallic  from  rocky  constituents  of  ore; 
of  a  rotary  drum  having  internal  helical  ribs,  pipes  for  delivering 
oil  and  ore  and  water  into  one  end  of  said  drum,  a  water-subsiding 
vessel  arranged  below  the  drum  and  receiving  the  oil,  ore  and  water 
therefrom,  a  centrifugal  drum  arranged  below  said  water-subsiding 
vessel,  and  a  pipe  for  conducting  the  metallic  portions  and  the  oil 
from   the  top   of   the   water-subsiding   vessel   into   said   centrifugal 
drum.    No.  653,340? 


MISSOURI    SCHOOL   OF    MINES.  63 

755  Apparatus    for    Separating    Solid    Bodies    from    Liquids. — Denis 
Gale,  of  Denver,  Colorado.    In  a  separating  apparatus,  the  combina- 
tion with  a  vessel,  consisting  of  two  chambers,  means  for  causing 
water  in  one  chamber  to  flow  in  a  thin  sheet  over  the  surface  of 
water  in  the  second  chamber,  a  conduit  with  a  flat  bottom  com- 
municating with  the  surface  of  the  water  in  the  second  chamber, 
and  a  slide  adjustable  over  the  surface  of  the  water  in  the  second 
chamber.    No.  655,338. 

756  Process    of    Separating    Metallic    from    Rocky    Constituents    of 
Ores. — Francis  E.  Elmore,  Leeds,  England.     The  process  of  separat- 
ing the  metallic  from  other  constituents  of  ore,  which  consists  in 
mixing  with  crushed  ore  to  which  sufficient  water  has  been  added 
to  make   a  flowing  mixture,  a   substance   other  than  mercury,  to 
which  the  metallic  particles  only  will  adhere,  and  then  recovering 
the  metallic  particles  from  such  substance.     No.  G76,679. 

757  Apparatus  for  Separating  or  Concentrating  Minerals  or  Ores.— 
Henry   Peareth  Hawdon  Brumell,  of  Buckingham,  Canada.     In   an 
apparatus  for  separating  or  concentrating  minerals  or  ores,  a  vessel 
adapted  to  contain  a  body  of  still  water,  a  water-supply  pipe  pro- 
jecting into  said  tank  below  the  water-level,  said  pipe  being  pro- 
vided with  a  nozzle  having  a  discharge  directed  toward  a  point  of 
the  end  wall  of  the  vessel  intermediate  the  water-level  and  the  level 
of  the  nozzle,  whereby  a  thin  stream  of  water  will  be  projected 
against  said  wall  and  deflected  thereby  across  the  surface  of  the 
body  of  wate  in  the  vessel  to  a  discharge  at  the  opposite  end  of 
the  vessel,  and  a  hopper  adapted  to  deliver  the  material  to  be  sep- 
arated to  said  stream.     No.  678,860. 

758  Graphite-Separator. — John  H.  Davis,  of  Glens  Falls,  New  York, 
assignor  to   United   States  Graphite   Company,  of  same  place.     A 
water  graphite-separator  of  trough-like  construction,  provided  with 
means  near  the  bottom  of  the  trough  for  distributing  the  inflowing 
water  to  the  machine;    in  combination  with  means  for  conveying 
the  water  and  the  graphite  on  the  surface  thereof  in  one  direction 
and  additional  means  for  conveying  the  tailings  in  a  different  direc- 
tion by  the  action  of  gravity  and  a  part  of  the  water;  together  with 
a  horizontally-disposed  perforated  partition  located  above  the  tail- 
ings-conveying means.     No.   679,473. 

759  Ore-Separator. — Alexander  A.  Allen,  of  Birmingham,   Alabama. 
The  combination  with  a  vessel  arranged  to  discharge  by  overflow 
a  broad,  unbroken  sheet  of  liquid,  a  receptacle  arranged  at  a  lower 
level  to  contain  a  body  of  approximately  still  water  and  to  discharge 
by  overflow  at  one  side,  a  broad  inclined  chute  extending  from  said 
vessel  to  a  point  in  said  receptacle  below  the  plane  of  discharge  of 
the  latter    and  arranged  to  receive  the  sheet  discharged  by  said 
vessel   and  deliver  it  substantially  unbroken  in  said  receptacle,  and 
means  for  placing  upon  the  moving  sheet  discharged  from  said  ves- 
sel a  thin  layer  of  material  to  be  separated.    No.  688,279. 

760  Separating  Mineral  Substances  by  the  Selective  Action  of  Oil. — 
Alexander  Stanley  Elmore,  of  London,  England.     The  process  for 
separating  metallic  and  rocky  constituents  of  ore,  which  consists  in 


64  MISSOURI    SCHOOL   OF    MINtfS. 

mixing  pulverized  ore  with  water  and  mixing  the  ore  and  water 
with  oil  in  the  presence  of  an  acid,  allowing  the  mixture  to  rest, 
whereby  the  oil  having  the  metallic  substances  entrapped  in  it 
floats  at  the  top  of  the  mixture,  and  separating  the  metallic  con- 
stituents from  the  oil.  No.  689,070. 

761  Apparatus  for  Separating  Minerals  by  Selective  Action  of  Oils. — 
Alexander   S.   Elmore,  London,   England.     The   combination   in  an 
apparatus  for  separating  metallic  from  rocky  constituents  of  ore, 
of  a  trough,  a  shaft  adapted  to  revolve  within  said  trough  and  pro- 
vided with  inclined  blades,  pipes  for  delivering  oil  and  water  to 
said  trough,  a  subsidence-tank  arranged  at  one  end  of  said  trough, 
extending  below  the  same  and  communicating  therewith,  said  tank 
adapted  to  receive  the  liquid  mineral  pulp  and  oil  from  said  trough, 
a  vertically-extending  partition  arranged   in   said   tank   at  the  top 
thereof  for  the  purpose  set  forth,  a  centrifugal  drum  arranged  at 
one  side  of  said  tank,  a  pipe  connected  to  said  tank  and  communi- 
cating with  said  drum  for  discharging  therein  the  metallic  ingred- 
ients and  the  oil,  and  a  pipe  connected  to  the  tank  for  discharging 
therefrom  the  earthy  and  rocky  ingredients.    No.  692,643. 

762  Apparatus    for   the    Separation   of   Minerals    by   the    Selective 
Action  of   Oils,   etc. — Alexander   S.   Elmore,  London,  England.     In 
apparatus   for    affecting   separation   of   minerals    by   the    selective 
action  of  oils  and  like  substances,  the  combination  of  a  stepped 
incline  for  downflow  of  the  mixed  pulp  and  oil,  with  a  traveling 
apron  arranged  over  and  in  suitable  proximity  to  the  said  stepped 
incline  for  downflow  of  the   mixed  pulp  and  oil  with  a  traveling 
No.  703,905. 

763  Ore-Separator. — John  W.  Wolf,  Randolph,  Iowa.     In  a  separator, 
the   combination   with   tank   adapted  to    contain   liquid,   of   a   sub- 
merged  hopper  therein,   and  vibrating   collecting-pan  in  the   tank 
under  the  hopper,  covered  by  a  convex  separating-sieve  which  is 
close  to  the  lower  edge  of  the  hopper,  forming  a  narrow  escape- 
opening  therebetween.     No.  725,609. 

764  Ore-Separator. — Charles    F.    Wheelock,    Birmingham,    Alabama. 
The  combination  of  a  vessel  adapted  to  be  filled  with  water  and 
provided  with   means   for   precisely   determining   the   level    of   the 
water,  a  chute  declining  toward  and  adapted  to  reach  said  level; 
a  transverse  water-pipe  slightly  below  the  water-level,  approximately 
parallel  with  and  in  proximity  to  the  discharge  edge  of  the  chute 
and  discharging  laterally  in  the  same  general  direction  as  the  chute; 
means  for  delivering  water  under  pressure  to  said  pipe;   means  for 
regulating  said  pressure;    and  means   for  causing  a  thin,  uniform 
stream  of  dry  graphite  to  descend  the  chute.    No.  734,641. 

765  Extraction  of  Zinc,  Lead  and  Silver  Sulphides  from  Their  Ores. 
— Guillaume  D.  Delprat,  Broken  Hill,  New  South  Wales,  Australia, 
The  method  of  separating  ores  from  gangue,  which  consists  in  form- 
ing a  bath  containing  nitric  acid,  feeding  finely  ground  ore  thereto, 
whereby  gas  bubbles  will  be  formed  on  the  ore  particles  to  raise 


MISSOURI    SCHOOL    OF    MINES.  65 

them  to  the  surface  of  the  solution,  and  removing  the  particles  of 
ore  so  lifted  to  the  surface.     No.  735,071. 

766  Process     of     Purifying    Graphite. — Moritz    Friedrich     Reinhold 
Glogner,  Freiburg,  Germany.     A  process  for  purifying  graphite  in 
a  wet  and  cold  manner  by  the  use  of  water  and  pstroleum,  consist- 
ing in  the   following   operations:      purifying   the   graphite   mineral 
from  its   heavy  admixtures    (as   for  instance  quartz,  iron  and  the 
like)   by  a  washing  with  cold  water;    mixing  said  purified  graphite 
mineral  with  about  three  or  four  times  its  weight  of  cold  water; 
very  strongly  agitating  said  paste  within  a  closed  vessel  after  the 
addition  of  a  quantity  of  petroleum  of  about  half  the  weight  of  the 
pure  graphite  contained  in  the  mixture;  and  then  sprinkling  water 
over  the  surface  of  the  liquid,  after  the  mixture  has  been  allowed 
to  stand,  in  order  to  obtain  a  quicker  and  more    complete    separa- 
tion  of   the   graphite   particles   from  the    earthy    substances.     No. 
736,381. 

767  Apparatus  for  Extracting  Gold  and  Other  Metals  from  Ores.— 
Edmund  L.  Vander  Naillen,  San  Francisco,  Cal.     An  apparatus  com« 
prising  a  concentrating  tank  provided  with  an  inlet  and  an  outlet, 
and  a  valve  disposed  transversely  within  the  tank  and  operating 
when   closed  to  separate  the  lower  portion  of  the  tank  from  the 
upper  portion  thereof.     No.  737,533. 

768  Process  of  Preparing  Concentrating-surfaces. — Arthur  De  Wint 
Foote,  Grass  Valley,   California.     The  process  of  preparing  a  con- 
centrating-surface,   consisting  in   commingling  petroleum  and  lime 
and  spreading  the  same  evenly  over  the  surface  of  a  concentrator. 
No.  744,322. 

769  Apparatus  for  Separating  Graphite  or  other  Materials  from  Asso- 
ciated Impurities. — Israel  F.  Good,  Allentown,  Pennsylvania,  assignor 
of  one-half  to   George  Francis   Pettinos,  Bethlehem,  Pennsylvania, 
and  John  Herbert  Harris,  Allentown,  Pennsylvania.     An  apparatus 
comprising  a  rotary  receiving-table,  and  pneumatic  means  for  hold- 
ing the  finer  particles  of  graphite  thereon  while  the  coarser  por- 
tions escape.     No.  745,960. 

770  Process  of  Separating  Zinc  Blende  from  Ores. — William  Jamie 
son  and  Francis  J.  Odling,  Melbourne,  Victoria,  Australia.     In  the 
separation  of  zinc-blende  from  ore  with  which  it  is  associated,  treat- 
ing the  ore  in  a  pulverized  state  and  sufficiently  wet  condition  with 
chlorine,  for  the  purpose  of  attacking  the  surface  of  the  zinc-blende 
and  submitting  the  ore  so  treated  to  a  vanning  motion.    No.  750,034. 

771  Mineral-Separator. — Homer  L.  Orr,  Greeley,  Colorado.    In  a  min- 
eral-separator   the    combination   of   a   receiving-tank,   a   separating- 
tank,  a  filtering-tank,  a  pipe  or  vessel  connecting  the  filtering-tank 
and  the  receiving  tank  having  therem  a  shaft  provided  with  spiral 
blades,  and  means  located  in  the  receiving-tank  and  driven  by  the 
inflowing  water  for  operating  said  shaft  to  return  the  filtered  liquid 
to  the  receiving  tank,   substantially  as  described,  and  a  feed-pipe 
from  the  receiving  tank  to  the  separating-tank.    No.  758,464. 


66  MISSOURI    SCHOOL    OF    MIXES. 

772  Apparatus  for  the  Concentration  of  Minerals  by  Means  of  Oil. — 
James  \V.  Van  Meter  and  Martin  P.  Ross,  San  Francisco,  California. 
An  apparatus  for  concentrating  minerals  by  means  of  oil,  compris- 
ing a  channel  through  which  the  oil  flows,  means  for  supplying  pulp 
and  water  to  the  oil  at  the  head  of  said  channel,  means  in  said 
channel  at  intervals  for  drawing  off  the  settled  gangue  and  water, 
means   at   the   foot   of   said    channel   for    separating   the   relatively 
upper  and  lower  portions  of  the  oil,  and  means  for  returning  said 
separated  upper  portion  of  oil  to  head  of  the  channel.    No.  762,774. 

773  Separation  of  the  Metallic  Constituents  of  Ores  from  Gangue. — 
Arthur  E.   Cattermole,  Highgate,   London,   England.     A  process   of 
separating    metalliferous    matter    from   gangue,    which    consists    in 
agitating  a  mixture  of  powdered  ore  and  water  with  oil  in  emulsion 
in   water    containing   an   alkaline   emulsifying  agent,   so   as   to   ag- 
glomerate the  oil-coated  particles  into  granules,  and  subjecting  the 
mixture  to  classification  to  remove  the  small  non-coated  particles 
from  the  granules.    Nos.  763,259  and  763,260. 

774  Apparatus  for  Use  in  Certain  Processes  of  Extracting  Sulphides 
from  Ores.— Guillaume  D.  Delprat,  Broken  Hill,  New  South  Wales, 
Australia,  assignor  to  Broken  Hill  Proprietary  Company,  Ltd.,  Mel- 
bourne, Victoria,  Australia.     In  an  ore  concentrating  apparatus  in 
which  the  concentrates  are  floated  to  the  top  of  a  body  of  liquid, 
a  pan   having   an  inclined   perforate   bottom   down   which   the    ore 
slides,  means  to  feed  liquid  to  the  pan,  a  sump  at  the  lower  edge 
of  the  bottom  for  tailings,  a  discharge  for  concentrates  at  the  liquid 
level  of  the  pan,  a  baffle-plate  between  tne  sump  and  pan  extending 
from  the  discharge  to  near  the  lower  edge  of  the  inclined  bottom  to 
maintain  a  quiescent  body  of  liquid  in  the  sump  and  at  the  same 
time  maintain  a  flow  of  liquid  from  the  pan  through  the  discharge. 
No.  763,662. 

775  Process   of   Effecting   the    Separation   of   Minerals. — George    A. 
Goyder  and  Edward  Laughton,  Adelaide,  South  Australia,  Australia. 
In  a  method  of  separating  minerals  and  extracting  some  of  them 
as  concentrates,  the  steps  of  moving  the  ore  in  a  finely-divided  state 
in  a  solution  which  by  the  production  of  gas  causes  certain  of  the 
minerals  contained  in  said  ore  to  rise;    and  deflecting  and  guiding 
them  as  they  rise.     No.  763,749. 

776  Process   of   Separating   Carbon  from   Pulverized   Carbonaceous 
Materials. — James  D.  Darling,  Philadelphia,  Pa.     A  process  of  sepa- 
rating carbon  from  pulverized  carbonaceous  material,  which  consists 
of  mixing  oil  with  said  material;  and  flowing  water  through  the  mix- 
ture and  through  an  obstruction  impervious  to  the  commingled  oil 
and  carbon,  but  previous  to  the  water  and  gangue.     No.  763,859. 

777  Process  of  Separation. — Alfred  Schwarz,  New  York,  N.  Y.,  as- 
signor to  Charles  N.  Lindley,  individually  and  as  trustee,  New  York, 
N.  Y.     A  process  of  separating  different  materials  by  the  selective 
action  of  two  liquids  of  different  specific  gravities,  which  consists 
in  introducing  the  materials  in  a  granular  or  pulverulent  condition, 


MISSOURI    SCHOOL    OF    MINES.  67 

quietly,  without  downward  impetus,  and  without  agitation,  into  a 
bath  of  oil  floating  upon  water.     No.  766.,289. 

778  Extracting   Zinc    or   Other    Sulphides    from    Their    Ores. — Guil- 
laume  D.   Delprat,   Broken   Hill,   New   South   Wales,   Australia.     A 
method   of  separating  ores   from  their   gangue,   which  consists  in 
forming  an  aqueous  solution  of  an  acid   capable  of  reacting  with 
the  ore  to  form  a  gas  and  increasing  the  density  of  said  solution 
by  adding  thereto  a  suitable  substance,  then  feeding  the  mixture 
of  ore  and  gangue  to  the  solution,  decreasing  the  density  of  the  gas 
as  it  is  formed  on  the  ore  particles,  and  removing  the  ore  particles 
raised  to  the  surface.    No.  768,035. 

779  Separation   of  Metals  from  Their  Ores. — Joseph   B.    Scammell, 
London,   England.     The  process   consists  in  bringing  finely-ground 
ore  suspended  in  water  into  contact  with  chloride  of  sulphur  diluted 
from  200  to  400  times  with  oil  matter,  whereby  the  metallic  par- 
ticles combine  with  the  sulphochlorinated  oil.    No.  770,659. 

780  Separation  of  Mineral  Substances  by  Means  of  the   Selective 
Action  of  Oil. — Cosmo  Kendall,  Upper  Norwood,  England.     A  pro- 
cess for  the  treatment  of  finely-divided  material  for  the  separation 
of  graphic  substance  contained  therein  from  associated  rocky  matter 
or  gangue,  consisting  in  mixing  said  material  with  water,  bringing 
said  material  intimately  into  contact  or  thoroughly  mixing  it  with 
suitable   pure   thin   oil,   as  kerosene   oil  or   paraffin   oil.   projecting 
at  a  considerable  velocity  the  mixture  so  produced  under  the  sur- 
face of  a  volume  composed  of  said  material,  water  and  oil,  allow- 
ing oil  and  graphitic  substance  adhering  thereto  to  r>ass  upward  to 
said  surface,  and  drawing  off  from  said  surface  oil  and  graphitic 
substance  immediately  on  arrival  at  said  surface.     No.  771,075. 

781  Process  of  Concentrating  Ores. — Alice  H.  Schwarz,  New  York, 
N.  Y.,  assignor  to  Schwarz  Ore  Treating  Company.     A  method  of 
concentrating  ores,  which  consists  in  mixing  a  melted  fatty  matter 
which  is  solid  at  normal  temperatures  with  the  ore,  then  solidify- 
ing the  fatty  matter  and  separating  the  gangue  from  the  values 
entrained   in   the   fatty   matter   while   the   latter   is    solidified.     No 
771,277. 

782  Process  of  Separating  Metals  from  Sulphide  Ores. — Charles  V. 
Potter,    Balaclava,    Victoria,    Australia.      A    process    of    separating 
metals  from  pulverized  sulphide  ores  which  consists  in  adding  to 
the  same  an  acid  solution  which  is  a  nonsolvent  of  the  precious 
metals,  then  applying  heat  to  the  same,  and  removing  the  sulphides 
from  the  surface  of  the  solution.    No.  776,145. 

783  Apparatus  for  Recovering  Precious  Metals. — Virginia  Tunbridge, 
Newark,  New  Jersey,  Administratrix  of  John  Tunbridge,  Deceased. 
An  apparatus  comprising  a  supply-channel,  a  screen  at  the  end  of 
said  supply-channel,  a  separator  connected  with  the  outlet  of  said 
supply-channel,  a  screen  located  at  the  outlet  of  the  separator  and 
provided  with  means  for  holding  soap,  and  a  filter  connected  with 
the  outlet  of  the  separator.     No.  777,159, 


68  MISSOURI    SCHOOL    OF    MINKS. 

784  Separation  of  the  Metallic  Constituents  of    Ores  from  Gangue. — 
Arthur  E.  Cattermole,  London,  England.     A  process  of  separating 
metalliferous    matter   from   gangue,   which   consists    in   mixing   the 
pulp  with  an  amount  of  oil  equaling  only  a  fraction  of  the  metal- 
liferous constituents,  agitating  the  mass  until  the  oil-coated  metal- 
liferous matter  is  agglomerated  into  granules,  and  subjecting  the 
mixture  to  classification   to   remove  the   small  noncoated   particles 
from  the  granules.     Xo.  777,273. 

785  Concentration   of   Minerals   from   Ores. — Arthur  E.   Cattermole, 
Henry  L.  Sulman,  and  Hugh  F.  Kirkpatrick-Picard,  London,  England. 
A  process  of  concentrating  ores  which  consists  in  mixing  the  ore 
pulp  with  soap  solution  and  a  mineral  acid  so  as  to  liberate  from 
the  soap  the  organic  acid  which  coats  the  desired  mineral  particles, 
but  not  the  gangue,  agitating  the  mixture  so  as  to  agglomerate  the 
coated  mineral  particles  into  granules  and  separating  the  granules 
from  the  non-coated  gangue.     No.  777,274. 

786  Apparatus  for  Separating  Sulphides   from   Their   Ores. — James 
H.  Gillies,   Melbourne,  Victoria,  Australia.     An   apparatus  for  sep- 
arating sulphides  from  ores,  comprising  a  treatment  pan  or  vessel, 
means  for  heating  the  same,  means  for  conveying  a  supply  of  cool 
or  cold  liquid  to  the  bottom  of  said  pan,  and  means  for  permitting 
said  liquid  to  escape  from  the  bottom  of  the  pan  to  carry  away  the 
drossy  matter  without  lowering  the  temperature  or  the  level  of  the 
heated  liquid  in  the  upper  part  of  said  treatment  pan  or  vessel. 
No.  778,747. 

787  Apparatus  for  Recovering  Zinc  or  Other  Sulphides  from  Their 
Ores. — James  H.  Gillies,  Melbourne,  Victoria,  Australia.     In  an  ap- 
paratus  for   recovering  zinc   and   other   sulphides   from   their   ores 
by  the  wet  or  chemical  process,  and  in  combination,  a  receptacle,  a 
series  of  radial  over-lapping  inclined  V-shaped  catchment-chutes  so 
placed  as  to  guide  the  rising  metallic  gaseously-supported  particles 
and  on  their  falling  receive  and  automatically  discharge  the  same, 
said  catchment-chutes  being  so  arranged  that  each  slightly  overlaps 
its  neighbor  on  one  side,  a  central  escapement-channel  into  which 
said  particles  fall,  and  means  for  removing  said  particles  from  said 
channel.     No.  780,281. 

788  Apparatus  for  Separating  and  Concentrating  Minerals. — George 
A.  Goyder  and  Edward  Laughton,  Adelaide,  South  Australia,  Aus- 
tralia.    Apparatus  for  separating  minerals  and  extracting  some  of 
them  as  concentrates,  consisting  of  a  vessel  adapted  to  contain  a 
solution,  the  floor  of  such  vessel  being  partly  horizontal  and  partly 
inclined  and  provided  with  means  for  heating  the  solution,  a  feed- 
ing-hopper extending  across  one  end  of  said  vessel  adapted  to  feed 
ore  or  minerals  in  a  finely  divided  state,  a  series  of  transverse  rod- 
rakes,  and  means  for  moving  them  at  a  regulated  speed  along  the 
bottom  of  the  vessel  from  the  feed  to  the  discharge  end,  inclined 
deflectors  along  and  above  the  bottom  of  the  separating  portion  of 
the  vessel,  trough-receptacles   arranged  parallel  with  the   said   de- 
flectors   and  at  such  distance  from  the  bottom  of  the  vessel  as  to 
enable  the  gas-raised  particles  of  mineral  to  be  deflected,  guided, 


MISSOURI    SCHOOL    OF    MINES.  69 

deposited  and  collected  therein,  sloping  extensions  of  said  troughs 
and  angular  rakes  for  discharging  the  concentrates  from  the  troughs 
through  the  sloping  extension  of  the  vessel.  No.  784,999. 

789  Separation   of  Metals  from   Their   Ores. — Jacob   D.  Wolf,  Lon- 
don, England.    A  process  of  separating  metals  from  their  ores  which 
consists  in  agitating  pulps  with  oil  until  the  oil  has  taken  up  all 
the   metallic-mineral    contents   with   some   gangue,    separating   the 
mineral-bearing  oil  from  the  pulps,  removing  suspended  particles  of 
gangue  from  the  oil  by  passing  it  through  warm  water  and  sepa- 
rating metallic  minerals  from  the  oil.     No.  787,814. 

790  Ore   Concentration. — Arthur   E.    Cattermole    Hrnry  L.    Sulman. 
and  Hugh  F.   Kirkpatrick-Picard,   London,   England.     A  process  of 
concentrating  ores  which  consists  in  mixing  a  freely  flowing  ore 
pulp  with  a  soap  solution  and  a  mineral  acid  so  as  to  liberate  the 
organic-acid  from  the  soap  throughout  the  suspended  ore  mass  in 
intimate   contact   therewith,   whereby   the   organic   acid   coats   the 
desired  mineral  particles  and  not  the  gangue,  and  thereafter  sep- 
arating  the   coated    mineral   matter   from   the   non-coated   gangue. 
No.  788,247. 

791  Mineral  Reclaimer  and  Saver. — Homer  L.  Orr  and  Fred  B.  Fin- 
ley,  Fort  Collins,  Colorado.     In  a  tank  divided  into  a  plurality  of 
compartments   of  different  sizes,  a  screen  arranged  in  the  larger 
compartment,  a  trough  arranged  below  the  screen,  a  plurality  of 
compartments,  each  containing  a  filtering  medium  and  means  for 
supplying  oil  and  water  to  the  compartments,  and  means  for  caus- 
ing the    liquids  to    traverse   a    tortuous    path    therethrough.     No. 
790,913. 

792  Apparatus  for  Saving  Precious  Values  in  Soils. — Benjamin  Wm. 
Rice,    Caldwell,   Idaho.    An   apparatus   for    saving   metallic   values 
from  sand,  gravel,  etc.,  comprising  a  shaking-screen,  a  trough  sup- 
ported by  arms  secured  to  said  screen,  a  screen-box,  bars  supported 
by   said   screen  and   positioned   underneath   the   exit   end    of   said 
trough,   a  tank  adapted  to  contain   water    and  oil    and  positioned 
underneath  said  screen  box,  sprocket-wheels  mounted  within  and 
upon  the  upper  edge  of  said  tank,  a  sprocket-chain  traveling  about 
said  wheels,  cross  pieces  secured  at  intervals  to  the  links  of  said 
chain  and  projecting  laterally   from   the    sides   of  the    chain    and 
adapted  to  travel  adjacent  to  the  bottom  of  the  tank  substantially 
its  entire  length,  and  a  gate  positioned  within  said  tank  and  under- 
neath which  said  cross-piece  upon  the  chain  are  adapted  to  travel. 
No.  792,617. 

793  Ore  Concentration. — Henry  Livingstone  Sulman  and    Hugh  Fitz- 
alis   Kirkpatrick-Picard,   London,   England.     A   process   of   concen- 
trating ores  which  consist  in  bringing  the  pulp  into  intimate  con- 
tact with  "oil"  in  the  form  of  spray  and  with  a  gas  and  thereafter 
separating   the   metalliferous   constituents   from   the   gangue.     No. 
793,808. 

794  Means   for  Effecting   Aqueous    Separation. — James   D.   Darling, 
Philadelphia,   Pennsylvania.     An    apparatus   for    effecting    aqueous 


70  MISSOURI    SCHOOL   OF    MINES. 

separation  which  consists  of  a  receptacle;  a  water  inlet  and  outlet 
to  the  same  with  means  for  regulating  the  flow  of  both;  a  for- 
aminate  partition  interposed  within  the  receptacle  on  the  side 
toward  which  the  water  flows;  an  agitating  apparatus  within  the 
receptacle  on  the  side  of  the  partition  toward  which  the  water  en- 
ters; and  propeller-blades  in  proximity  to  the  partition  by  the  rota- 
tion of  which  the  material  in  the  receptacle  may  be  constantly 
driven  away  from  the  partition  in  opposition  to  the  flow  of  the  cur- 
rent. No.  795,823. 

795  Treatment   of    Sulfids    and    Complex    Ores.— Charles    H.    Ward, 
Sydney,  New  South  Wales,  Australia.     A  process  of  roasting  ores 
in  the  presence  of  heated  gases,  which  consists  in  first  passing  the 
ore  through  a  current  of  such  gases  in  a  direction  opposite  to  the 
flow  thereof,  and  subsequently  causing  the  ore  and  the  current  of 
gases  to  move  together  in  the  same  direction,   and  reducing  the 
temperature  of  the  heated  gases  as  they  and  the  ore  are  moved 
together  in  the  same  direction.     No.  799,696. 

796  Process  for  Concentrating  Ores. — Walter  Murray  Sanders,  lola, 
Kansas.     The  methods  of  concentrating  ore,  which  consists  i->.  sub- 
jecting it  to  a  non-acid  solution  capable  of  reacting  with  evolution 
of  gas,  and  collecting  such  particles  as  are  sustained  by  the  evolved 
gas.     No.  805,382. 

797  Process    of   Concentrating    Ores. — Alfred    Schwarz,    New    York, 
N.  Y.,  Assignor  to  Schwarz  Ore  Treating  Company,  Phoenix,  Ari- 
zona Territory,  a  corporation  of  Arizona  Territory.    The  method  of 
treating  ores  which  consists  in  subjecting  a  non-sulfid  ore  to  the 
action  of  a  soluble  sulfid  to  convert  the  mineral  into  a  sulfid,  then 
treating  the  mass  with  a  hydrocarbon   and  finally   separating   the 
hydrocarbon   with  the   entrapped   metallic   constituents   of   the   ore 
from  the  tailings.    No.  807,501. 

798  Process   of   Concentrating    Ores. — Alfred    Schwarz,    New   York, 
N.  Y.     Assignor  to  the   Schwarz  Ore  Treating  Company,  Phoenix, 
Arizona  Territory,  a  corporation  of  Arizona  Territory.     The  method 
of  concentrating  ores  which  consists  in  mixing  with  the  pulverized 
ore  an  agent  to  which  the  metallic  constituents  will  adhere,  con- 
sisting of  a  mixture  of  a  normally  non-liquid  resinous  hydrocarbon 
and    a    non-resinous    hydrocarbon,    then    separating    said    adhesive 
agent  with  the  entrprmecl  vniues  from  the  tailings,  and  finally  sep- 
arating the  values  from  said  agent.     No.  807,502. 

799  Process   of    Concentrating    Ores. — Alfred    Schwarz,   New   York, 
N.   Y.,  assignor  to   the   Schwarz  Ore  Treating  Company,   Phoenix, 
Arizona  Territory,  a  corporation  of  Arizona  Territory.     The  process 
of  concentrating  ores  consisting  of  mixing  with  the  pulverized  ore 
a  selective  agent  consisting  of  a  mixture  of  a  liqufd   hydrocarbon 
and  a  normally  solid  fatty  matter,  which  mixture  is  solid  at  normal 
temperatures,  separating  said  agent  with  its  entrapped  values  from 
the  tailings,  and  finally  recovering  the  values  from   the  selective 
agent.     No.  807,503. 


MISSOURI    SCHOOL   OF    MINES.  71 

800  Process    of   Concentrating   Ores. — Alfred   Schwarz,   New   York, 
N.  Y.,  Assignor  to  Schwarz  Ore  Treating  Company,  Phoenix,  Ari- 
zona Territory,  a  corporation  of  Arizona  Territory.     The  process  of 
concentrating   ores   consisting  in  melting  a  normally   solid  hydro- 
carbon, mixing  dry  pulverized  ore  therewith,  separating  said  hydro- 
carbon with  its  entrapped  values  from  the  tailings  by  subjecting 
the  mixture  to  the  action  of  a  bath  of  heated  water  while  main- 
taining said  hydrocarbon  in  a  melted  condition,  and  finally  recov- 
ering the  values  from  the  hydrocarbon.     No.  807,504. 

801  Process  of  Concentrating  Ores. — Alfred  Schwarz,  of  New  York, 
N.  Y.,  assignor  to  Schwarz  Ore  Treating  Company  of  Phoenix,  Ari- 
zona Territory,  a  corpoation  of  Arizona  Territory.     The  process  of 
concentrating  ores  consisting  in  mixing  the  ore  out  of  contact  with 
water  with  an  adhesive  agent  composed  of  a  hydrocarbon  and  sulfur, 
separating  said  agent  with  the  entrapped  values  from  the  tailings, 
and  recovering  the  values  from  the  adhesive  agent.     No.  807,505. 

802  Process  of  Concentrating  Ores. — Alfred  Schwarz,  of  New  York, 
N.  Y.,  assignor  to  Schwarz  Ore  Teating  Company,  of  Phoenix,  Ari- 
zona Territory,  a  corporation  of  Arizona  Territory.    The  process  of 
concentrating  ores  consisting  in  melting  a  normally  solid  resinous 
hydrocarbon,    mixing    the    pulverized    ore    therewith    and    separat- 
ing said  hydrocarbon  with  its  entrapped  values  from  the    tailings, 
and   finally   recovering  the   values   from  the   resinous   hydocarbon. 
No.  807,506. 

803  Process   of  Separating  Minerals. — Edmund   B.  Kirby,   of  Ross- 
land,  Canada.     The  process  of  separating  minerals,  which  consists 
in  mixing  together  the  pulverized  mineral  material,  a  considerable 
quantity   of   water,   and   a   solution   of   bitumen   and   kerosene;    in 
gently  agitating  this  mixture,  and  in  blowing  a  gas  into  the  same 
to  assist  in  the  flotation  of  said  solution  and  the  mineral  particles 
which  have  been  coated  thereby;   and  in  separating  said  solution 
and  mineral  particles.     No.  809,959. 

804  Process    of   Recovering    Values    from    Sulfid    Ores. — Edwin    C. 
Pohle,  Reno,  Nevada.     The  process  of  recovering  values  from  sul- 
fid  ores  which  consists  in  mixing  the  ore  with  a  chlorid,  subjecting 
the  mixture  to  heat  in  an  oxidizing  atmosphere,  cooling  the  product, 
leaching  the  mass  with  water,  to  remove  the  contained  bodies  solu- 
ble therein,  leaching  the  residue  with  a  solution  of  a  cyanid  of  an 
alkali  metal,  and  finally,  precipitating  the  gold  and  silver  from  the 
solution.    No.  811,085. 

805  Graphite-Separator. — John    Henry   Davis,    of   Glens    Falls,   New 
York.     A  graphite-separator,  comprising  a  main  trough,  means  for 
feeding  graphite  ore  and  water  thereto,  means  for  maintaining  a 
water-level  in  the  trough,  and  a  series  of  partitions  in  the  trough, 
each  provided  with  a  separating-plate  having  its  front  end  located 
just  below  said  water-level;  each  of  said  plates  being  provided  with 
means   for,  carrying  away  fine  sand  and  mud  from   a  point  near 
the  surface  of  the  water.    No.  816,303. 

806  Ore-Separator.— Fred  B.  Finley,  of  Los  Angeles,  California.     In 
an  ore-separator,  the  combination  of  a  tank  provided  with  an  outlet- 


72  MISSOURI    SCHOOL   OF    MINES. 

valve,  a  combined  hopper  and  coil  mixer  arranged  within  the  tank, 
a  second  tank  into  which  the  first  tank  discharges,  a  third  tank  into 
which  the  second  tank  discharges,  a  float-operated  valve  in  the  sec- 
ond tank  for  controlling  passage  of  oil  to  the  third  tank,  a  valve  in 
the  first  tank,  a  rock-beam,  and  a  connection  between  the  rock- 
beam  and  the  float  of  the  second  tank  and  the  valve  of  the  first 
tank.  No.  822,515. 

807  Separator    for    Use    in    the     Concentration     of     Ores. — Alfred 
Schwarz,   of  New  York,  N.  Y.,  assignor  to   Schwarz   Ore   Treating 
Company,  of  Phoenix,  Arizona  Territory,  a  corporation  of  Arizona 
Territory.     In  a  separator  for  use  in  the  concentration  of  ores  the 
combination  of  a  kettle  adapted  to  contain  water,  shelves  supported 
within  said  kettle,  scrapers  cooperating  with  said  shelves  to  impart 
a  continuous  movement  to  the  contents  of  the  kettle,  an  over-flow- 
discharge  outlet  at  the  top  for  the  concentrates  and  adhesive  agent, 
and  a  discharge-outlet  at  the  bottom  of  the  kettle  for  the  tailings 
No.  825,080. 

808  Process    for   Separating   Finely-Divided    Material.— Francis    Ed- 
ward Elmore,  of  London,  England.     A  process  of  separating  certain 
constituents  of  finely-divided  material  consisting  in  mixing  the  ma- 
terial with  a  liquid  and  a  substance  that  has  a  selective  affinity  for 
some  of  the  constituents,  subjecting  the  mixture  to  a  pressure  below 
that  of  the   atmosphere   and   collecting  the   particles   floated.     No. 
826,411. 

809  Ore  Concentration. — Henry  Livingstone  Sulman,  Hugh  Fitzalis 
Kirkpatrick-Picard,  and  John  Ballot,  of  London,  England.     The  pro- 
cess of  concentrating  powdered  ores  which  consists  in  separating 
the   mineral  from  the   gangue   by  coating  the  mineral  with  oil  in 
water  containing  a  small  quantity  of  oil,  warming  the  mixture,  agi- 
tating the  mixture  to  form  a  froth,  and  separating  the  froth.     No. 
835,120. 

810  Ore  Concentration. — Henry.    Livingstone     Sulman,     of    London, 
England.    A  process  for  concentrating  ores  which  consists  in  mixing 
the   powdered   ore   with   water,   adding  a   small   proportion   of  oily 
liquid  having?  a  preferential  affinity  for  metalliferous  matter,  agitat- 
ing  the   mixture,    heating   the   mixture   until   gaseous   bubbles    are 
generated  therein  so  that  the  oil-coated  mineral  matter  forms  into 
a  froth  and  separating  the  froth  from  the  remainder  by  flotation. 
No.  835,143. 

811  Ore  Concentration. — Henry  Livingstone  Sulman,  Hugh  Fitzalis 
Kirkpatrick-Picard,  and  John  Ballot,  of  London,  England,  assignors 
to  Minerals  Separation,  Limited,  of  London,  England.     The  process 
of  separating  powdered  minerals  from  one  another  which  consists 
in  suspending  the  powdered  minerals  in  a  liquid,  subjecting  the  mix- 
ture to  a  gas-pressure  and  thereafter  relieving  the  pressure  whereby 
bubbles  of  gas  are  liberated  in  the  pulp  and  carry  certain  minerals 
to  the  surface.     No.  835,479. 

812  Separating-Tank.— Edmund   B.   Kirby,   of  Rossland,  British   Co- 
lumbia, Canada.     The  combination  of  a  separating-tank  containing 


MISSOURI    SCHOOL   OF    MINES.  73 

agitator  mechanism,  with  means  for  discharging  into  the  contained 
fluid  charge  a  gas  and  a  liquid  lighter  than  water  and  immiscible 
therewith.  No.  838,626. 

813  Process  of  Concentrating  Ores. — Alfred  Schwarz,  of  New  York, 
N.  Y.,  assignor  to  Schwarz  Ore  Treating  Co.,  of  Phoenix,  Arizona 
Territory,  a  corporation  of  Arizona  Territory.     The  method  of  con- 
centrating ores  consisting  in  mixing  with  the  pulverized  ore  rosin- 
oil,  then  separating  said  agent  with  its  entrapped  values  from  the 
tailings  and  finally  recovering  the  values  from  said  agent.    No.  842,255. 

814  Apparatus  for  Separating  Minerals. — James  Francis  Latimer,  of 
Toronto,  Ontario,  Canada.     An  apparatus  comprising  a  vessel  pro- 
vided with  a  funnel-shaped  bottom  having  a  controlled  discharge- 
opening  at  the  apex  thereof;    an  upwardly-sloping  deflecting  plate 
extending  into  said   vessel;    a   screen   of  suitable  mesh   supported 
within  said  vessel  at  the  top  of  the  funnel-shaped  bottom  thereof; 
a  rotatable  pipe  or  conduit  for  introducing  water  into  said  vessel  and 
having  its   discharge-end  opening  below  said   screen;    horizontally- 
held  paddles  supported  by  said  conduit  at  the  required  angle  and 
designed  to  operate  above  said  screen  so  as  to  create  a  centrifugal 
force  so  as  to  divide  the  graphite  from  the  rocky  matter  or  gangue 
and  at  the  same  time  create  an  additional  upward  current  in  the 
water  above  said  screen  to  that  caused  by  the  flow  of  water  up- 
ward through  said  screen  so  as  to  cause  the  oil-provided  graphite 
to  rise  to  the  top  of  the  water  so  that  it  may  be  caught  by  said 
deflecting  plate  and  so  conducted  out  of  said  vessel.     No.  851,599. 

815  Process   for   Separating  Minerals. — James   Francis   Latimer,   of 
Toronto,  Ontario,  Canada.     The  process  of  separating  graphite  and 
similar   substances   from  rocky   matter   and    gangue,    consisting   in 
mingling  the  crushed  ore  with  oil;  delivering  the  oil-provided  mass 
to;  and  maintaining  it  in  an  upflowing  current  of  water;  centrifug- 
ally  agitating  the  mass  to  separate  the  components  and  so  acceler- 
ate the  current  as  to  carry  the  oil-provided  graphite  to  the  top  of 
the  water;    flowing  the   so  separated  graphite  away;    settling  the 
gangue  through  an  upflowing  current  of  reduced  speed  below  the 
zone  in  which  the  material  is  fed  and  agitated,  and  removing  said 
gangue  by  a  downwardly-flowing  current.    No.  851,600. 

816  Process   of  Separating  Zinc-Blende   by1  Flotation. — Auguste  Jo- 
seph Francois  Debavay,  of  Kew,  Victoria,  Australia.     A  process  of 
separating   zinc   blende   particles   from   ores,   tailings,   and   concen- 
trates in  a  pulverized  condition  comprising  the  freeing  of  zinc  blende 
particles  from  the  carbonates  and  other  impurities  by  first  submit- 
ting the  material  to  the  action  of  a  chemical  re-agent,  and  then  dis- 
charging the  material  in  a  film-like  manner  into  a  body  of  water 
by  delivering  the  material  in  a  thin  pasty  condition   in  the  pres- 
ence of  a  stream  of  water  upon  an  inclined  surface  extending  to 
said  body  of  water,   and  then  separating  the  zinc  blende  floating 
on   the   water   from   the   remaining  ores,   tailings,   or   concentrates 
which  precipitate  in  the  body  of  water.    No.  864,597. 

817  Method  of  Separating  the  Metallic  anl   Rocky  Constituents  of 
Ores.— Dudley  H.  Norris,  of  New  York,  N.  Y.     The  method  of  sep- 
arating the  metallic  and  rocky  particles  of  ore,  which  consists  in 


74  MISSOURI    SCHOOL   OF    MINKS. 

introducing  a  stream  of  water  containing  air  in  solution  into  a 
mixture  composed  of  crushed  ore,  oil  and  water  to  cause  bubbles  of 
air  to  form  in  said  mixture  and  rise  to  the  surface  thereof  to  carry 
off  the  metallic  particles  of  the  ore.  No.  864,856. 

818  Process  for  Separating  Solids. — Arthur  P.  Stanley  Macquisten, 
of  Glasgow,  Scotland.    A  process  for  separating  solids  having  differ- 
ent surface   affinities  for  liquids,   consisting  in  forming  a   pulp   of 
the   mixture,   bringing   the   commingled   particles   through   the   sur- 
face of  a  gently  flowing  stream  of  liquid  and  returning  the  same  to 
the   stream  in   a   direction  transverse   to  the   flow   of  the   stream, 
and  collecting  concentrates  thereby  caused  to  float  upon  the  stream. 
No.  865,194. 

819  Apparatus  for   Separating  Solid  Particles   from  Each   Other. — 
Arthur  P.    Stanley   Macquisten,   of   Glasgow,   Scotland.     Means   for 
separating  a  mixture  of  finely  divided  particles  of  ore,  comprising  a 
cylinder  arranged  to  rotate  in  contact  with  a  body  of  liquid,  said 
cylinder  passing  through   the   surface  of  the  liquid  in  such  direc- 
tion as  to  carry  the  particles  there  through  and  to  cause  them  to 
roll'  back  to  the  surface  of  the  liquid,  said  cylinder  having  a  ribbed 
interior  surface.     No.  865,195. 

820  Apparatus   for   Separating  Solid   Particles   from  Each   Other. — 
Arthur  Penrhyn  Stanley  Macquisten,  of  Glasgow,  Scotland.     Means 
for   separating   a   mixture   of   finely-divided   particles    of   ore,    com- 
prising a  support  for  said  particles  arranged  to  move  in  contact  with 
a  body  of  liquid,  said  support  passing  through  the  surface  of  the 
liquid  in  such  direction  as  to  carry  the  particles  there  through  and 
to  cause  them  to  roll  back  to  the  surface  of  the  liquid.    No.  865,260. 

821  Apparatus  for  Concentrating  Ores. — Alexander  S.  Elmore,  Lon- 
don, England,  Assignor  to  the  Ore  Separation  Company  (1905)  Lim- 
ited, London,  England.     Apparatus  for  the  treatment  of  ores  with 
oil,  comprising  a  mixing  tank,  a  mixing  device  for  intimately  mix- 
ing a  pulp  of  the  ore  with  oil  in  the  mixing  tank,  and  a  floating 
sea  of  oil  inclosed  by  a  ring  for  excluding  the  air  from  the  said 
tank  during  the  mixing  process.    No.  865,334. 

822  Apparatus  for  Separating  the  Metallic   Particles    of    Ores  from 
the    Rocky   Constituents    Thereof. — Dudley  Hiram   Norris,    of   New 
York,  N.  Y.    An  apparatus  comprising  a  receptacle  having  its  upper 
end  open  to  the  atmosphere  and  adapted  to  receive  a  flowing  mix- 
ture of  pulverized  ore  and  water,  means  for  introducing  a  stream 
of  water  containing  air  in  solution  into  the  mixture  in  said  receptacle 
to  cause  infinitesimally  small  nascent  bubbles  of  air  to  form  in  said 
mixture  and  rise  to  the  surface  thereof  to  collect  the  metallic  par- 
ticles  of  the   ore  together,  a  member  arranged  at  the  upper  end 
of  said  receptable  to  receive  the  metallic  particles  of  the  ore,  and 
a  discharge  pipe  at  the  lower  end  of  the  receptacle  out  of  which 
the  water  and  the  rocky  particles  of  the  ore  pass.     No.  873,586. 

823  Separation  of  Metalliferous  Minerals  from  Gangue. — Henry  Liv- 
ingstone Sulman,  Hugh  Fitzalis  Kirkpatrick-Picard,  and  John  Bal- 
lot,  of  London,   England,     The   procoss    of  treating   ores   to-  sepa- 


MISSOURI    SCHOOL   OF    MINES.  75 

rate  metalliferous  matter  from  gangue  which  consists  in  mixing 
the  powdered  mineral  with  water  to  form  a  freely  flowing  pulp,  agi- 
tated by  the  mineral  pulp  with  a  small  quantity  of  oil  sufficient  only 
to  impart  a  thin  coating  of  oil  to  the  metalliferous  particles,  dis- 
tributing the  mixture  in  the  form  of  a  thin  sheet  of  flowing  liquid, 
causing  the  immersed  particles  to  be  exposed  to  the  air  and  there- 
after to  meet  the  surface  of  the  liquid,  collecting  the  floating  oiled 
metalliferous  particles  and  collecting  the  gangue  which  sinks.  No. 
879,985. 

824  Separation  of  Metals  from  Their  Ores. — Jacob  D.  Wolf,  of  Lon- 
don, England.    The  combination  with  a  traveling  belt,  of  means  for 
coating  one  face  of  same  with  a  metal  selective  substance,  means 
for  roughening  said  coating,  said  roughened  coating  adapted  to  re- 
ceive wet  ore  pulp,  and  means  for  relieving  said  belt  of  said  se- 
lective substance  and  adhering  metals.     No.  899,149. 

825  Process  for  Separating  Metals  from  Their  Ores. — Jacob  David 
Wolf,  of  London,  England.     A  method  of  separating  metals  from 
their  ores  which  consists  in  forming  a  pulp;  passing  said  pulp  con- 
taining the  metals  over  an  oily  adhesive  substance;  and  in  abrading 
the  surface  of  said  substance  by  drawing  apart  the  body  of  the 
same,  and  thereby  causing  some  of  the  mineral  particles  to  adhere 
thereto.     No.  899,478. 

826  Ore-Concentrator. — Henry  Livingstone  Sulman  and  Evan  Aspray 
Sulman,  of  London,  England,  assignors  to  Minerals  Separation,  Lim- 
ited, of  London,  England.     In  an  apparatus  for  concentrating  ores 
the  combination  of  a  fixed  surface,  means  for  feeding  powdered  ore 
over  the  surface,  means  for  continuously  feeding  a  thin  stream  of 
liquid  over  the  surface,  a  movable  body  having  a  flexible  squeegee 
edge  in  contact  with  the  surface  sufficiently  flexible  to  pass  over 
the  ore  while  exerting  sufficient  pressure  on  the  surface  to  remove 
the  film  o£  water  therefrom,  means  for  sweeping  the  body  over  the 
surface  in  a  direction  at  right  angles  to  the  direction  of  flow  of 
the  water  to  cause  the  ore  to  be<  alternately  exposed  to  the  air  and 
to  the  edge  of  the  liquid.    No.  902,018. 

827  Apparatus  for  Concentrating  Ores. — Walter  Murray  Sanders,  of 
Marion,   Kentucky.     Apparatus   for   concentrating  ore   by  flotation, 
comprising  a  tank  having  means  for  introducing  ore  and  solution 
below  the  normal  liquid  surface,  a  central  discharge  gate  for  tail- 
ings, a  substantially  central  overflow  for  concentrate,,  and  means 
for  imparting  a   whirling  motion  to  the  liquid   in  the  tank.     No. 
911,077. 

828  Apparatus  for  Separating  Ores   by  Flotation. — Auguste  Joseph 
Francois  De   Bavay,   of  Kew,  Victoria,  Australia.     A  method  with 
the  combination  of  a  feed  pipe,  a  rotary  worm  therein,  an  ore  supply 
connected  to  each  terminal  of  said  pipe,  a  water  supply  pipe  ar- 
ranged parallel  and  adjacent  to  said  feed  pipe,  a  plurality  of  inclined 
chutes,  distributing  means  extending  transversely  of  each  chute,  a 
liquid  containing  receptacle  at  the  lower  end  of  each  chute,  pro- 
vided at  one  side  with  an  adjustable  overflow  lip  and  inclined  gutter 
for  receiving  and  conveying  the  particles  capable  of  flotation,  an  end- 


76  MISSOURI    SCHOOL   OF    MINES. 

less  traveling  belt  in  each  of  said  receptacles  having  one  end  sub- 
merged therein  and  adapted  to  convey  the  heavier  constituents  from 
one  trough  to  the  succeeding  inclined  chute,  spray  pipes  adapted1  to 
deliver  water  upon  the  belts  after  they  have  emerged  from  said 
receptacles,  and  operating  means  common  to  said  distributing 
means  and  said  endless  traveling  belts.  No.  912,783. 

829  Ore    Separating    Process. — Marcus    Ruthenburg,    of    Lockport, 
New  York.     A  process  of  separating  ore  or  concentrate  particles  of 
different  specific  gravity,  which  cannot  be  wetted  in  water,  which 
consists  in  surrounding  the  same  with  a  non-metallic  liquid  capable 
of  wetting  the  surfaces  of  said  particles  so  that  they  are  separated 
by  gravity  without  flotation  in  said  liquid.     No.  933,491. 

830  Process   of   Treating   Ores. — Alfred   A.    Lockwood   and    Marcus 
R.    A.    Samuel,    London,   England.      The    process    of   treating   ores, 
which  consists  in  mixing  an  ore  with  a  magnetic  substance  and  an 
oily   liquid    adapted    to    cause    the    magnetic    substance    to    adhere 
to  some  constituent  part  of  the   ore  in  preference   to  the   others, 
and  then  magnetically  separating  the  mixture.     No.  933,717. 

831  Roasting  Separation  Process. — Henry  Azor  Wentworth,  of,  New- 
ton, Massachusetts,  assignor  to  Huff  Electrostatic  Separator  Com- 
pany, of  Boston,  Massachusetts,  a  corporation  of  Maine.     The  pro- 
cess of  separating  zinc  sulfid  from  other  sulfids  associated  therewith 
which  consists  in  superficially  changing  sulfids  other  than  zinc  sul- 
fids by  subjecting  the  mass  to  heat,  and  thereafter  separating  by 
flotation,    the    heat-affected    particles    from    those    unaffected.      No. 
938,732. 

832  Apparatus  for  Ore  Concentration. — Theodore  Jesse  Hoover,  of 
London,  England,  assignor  to  Minerals  Separation  Limited,  of  Lon- 
don, England.     In  an  apparatus  for  concentrating  ores  by  gaseous 
flotation  of  certain  mineral  particles  in  liquid,  the  combination  of, 
an  agitation  vessel,   a   spitzkasten  contiguous   thereto,  said  vessel 
and   spitzkasten  adapted   to   contain  circuit  liquid,   means   for  agi- 
tating the  contents  of  the  agitation  vessel  so  as  to  beat  air  into  the 
liquid,  and  a  wall  between  the  agitation  vessel  and  the  spitzkasten 
having  a  wide  communication  orifice  below  the  level  of  the  liquid 
in  both  vessels,  said  agitation  vessel  adapted  to  discharge  substan- 
tially directly  into  the  spitzkasten.     No.  953,746. 

833  Concentration  of  Ores. — Henry  Livingstone  Sulman,  of  London, 
England,    assignor    to    Minerals    Separation    Limited,    of    London, 
England.    A  process  of  concentrating  ores  which  consists  in  mixing 
the  powdered  ore  with  slightly  acidified  water  containing  in  solution 
a  minute  quantity  of  an  alcohol,  agitating  the  mixture,  bringing  the 
ore  particles  into  contact  with  air  so  as  to  cause  the  metallic  sulfids 
to  float  and  separating  the  floating  particles.     No.  955,012. 

834  Process  of  Treating  Ores. — Alfred  A.  Lockwood  and  Marcus  R. 
A.    Samuel,    London,    England,    assignors    to    the    Murex    Syndicate 
Limited,  London,  England.     A  process  of  treating  sulfid  ores  which 
consists  in  crushing  ores  composed  of  friable  sulfids  in  which  the 
commingled    grains    or   particles    are    bound   together    by    a   sulfid, 
agitating  such  crushed   ores   with   an   alkaline   silicate   solution   to 


MISSOURI    SCHOOL    OF    MINES.  77 

weaken  the  bonds  between  the  grains  of  the  commingled  sulfids  on 
cleavage  lines  so  that  they  may  be  advantageously  separated  with- 
out excessive  grinding  and  concomitant  sliming  and  then  subject- 
ing said  particles  to  separation  and  separate  collection.  No.  956,381. 

835  Process  of  Treating  Ores  and  Carboniferous  Earths. — Alfred  A. 
Lockwood,  of  London,  England.    In  a  process  for  treating  ores,  agi- 
tating the  ore  with  a  mixture  comprising  water,  an  insoluble  me- 
tallic compound  containing  oxygen  and  an  oily  liquid  which  has  been 
so  treated  that  it  contains  a  minute  quantity  of  a  metallic  compound 
insoluble  in  water  for  the  purpose  of  preventing  the  washing  out  of 
said    insoluble   metallic   compound,   and   then   separating   the   oiled 
particles   from   the   unoiled   particles   by   a    flotation   process.     No. 
956,773. 

836  Process  for  Treating  Metallic  Slimes. — James  Dunstone,  of  Dol- 
lar  Bay,   Michigan.      The    process     consisting   in    agitating    copper 
slimes  in  the  presence  of  an  emulsion  of  oil,  an  aqueous  solution 
of  sodium  nitrate,  and  an  acid  adapted  to  decompose  the  sodium 
nitrate,  and  collecting  the  portion  floated.    No.  956,800. 

837  Apparatus  for  Electrical   Separation. — Henry  Azor  Wentworth, 
Newton,  Mass.,  assignor  to  Huff  Electrostatic  Separator  Company, 
Boston,  Mass.,  a  Corporation  of  Maino.     In  an  electrical  separator, 
a  conveyor  electrode,  means  to  deliver  comminuted  material  thereto, 
an  adjacent  spray  discharging  electrode,  and  an  insulated  electro- 
conductive  shield,  so  disposed  in  relation  to  the  two  electrodes  as 
to  intercept  further  lodgment  of  the  spray  upon  material  affected 
by  the  spray  earlier  in  the  conveyance  of  the  material,  and  so  as 
to  produce,  in  opposition  to  the  surface  of  tho  conveyor  electrode, 
a  material-repelling  static  field,  and  means  to  collect  separately  the 
separated  material.     No.  960,470. 

838  Ore  Concentration. — Henry  Livingstone  Sulman,  Henry  Howard 
Greenway,   and   Arthur   Howard   Higgins,   of   London,   England.     A 
process  of  concentrating  ores  which  consists  in  mixing  the  powdered 
ore  with  water  containing  in  solution  a  small  quantity  of  a  mineral- 
frothing  agent,  agitating  the  mixture  to  form  a  froth  and  separating 
the  froth.     No.  962,678. 

839  Method  of  Separating  Minerals. — Alexander  S.  Ramage,  of  De- 
troit, Michigan,  assignor  to  Chemical  Development  Co.,  of  Buffalo, 
New  York,  a  corporation  of  Colorado.     The  method  of  treating  ores 
containing  a   plurality   of   mineral   components,   which   consists   in 
immersing  the  ore  in  a  suitable  solution,  separately  floating  said 
mineral   components   by   progressively   raising  the   temperature   of 
the  solution,  and  removing  at  each  rise  of  temperature  the  product 
separated  during  such  rise.     No.  967,671, 

840  Process  of  Separation. — Henry  Azor  Wentworth,  of  Lynn,  Massa- 
chusetts, assignor  to  Huff  Electrostatic  Separator  Company,  of  Bos- 
ton, Massachusetts,  a  corporation  of  Maine.     The  process  of  sep- 
arating ingredients  of  comminuted  material,  which  consists  in  as- 
sociating with  the  material  a  substance  chemically  reactive  upon 
particles  thereof,  thereby  producing  upon  the  particles  affected  by 


78  MISSOURI    SCHOOL    OF    MIXES. 

the  reactive  substance  superficial  coatings  of  a  compound  different 
from  the  original  substance  of  the  particles  in  respect  to  film-tension 
of  a  liquid,  and  thereupon  separating  the  differentiated  particles  by 
film-tension  of  said  liquid.  No.  970,002. 

841  Apparatus  for  Separating  Minerals  from  Their  Ores. — Sajnuel 
K.  Behrend,  of  Denver,  Colorado.     The  combination  with  a  separat- 
ing tank  adapted  to   contain  liquid,   and  a  pipe  which  discharges 
radially  at  the  center  of  the  tank  and  at  the  surface  of  the  liquid 
therein,  of  a  barrier  located  between  the  water  inlet  and  overflow, 
said    barrier    having    members    in    the    path    of    material    floating 
thereon,  and  a  screen  located  above  the  tank  between  said  means 
and  the  water  outlet,  for  sifting  the  material  to  be  treated  upon 
the  surface  of  the  liquid  in  the  tank.     No.  973,467. 

842  Apparatus  for  Ore  Concentration.     Theodore  Jesse  Hoover,  Lon- 
don, England,  assignor  to  the  Minerals  Separation  Limited,  London, 
England.  Apparatus  for  concentrating  ores  by  gaseous  flotation  of 
certain    mineral    particles    in    liquid    comprising   in    combination    a 
mixing  vessel,  an  agitator  in  the  mixing  vessel,  a  spitzkasten  at  the 
outlet  of  the  mixing  vessel,  a  secondary  mixing  vessel,  a  centrifu- 
gally  acting  agitator  in   said  secondary  mixing  vessel  and  a  con- 
necting conduit  between  the  tailings  outlet  of  the  spitzkasten  and 
the  zone  of  the  suction  influence  of  the  centrifugally  acting  agita- 
tor of  said  secondary  mixing  vessel.    No.  979,857. 

843  Process   of  Concentrating  Ores. — Walter  Murray  Sanders,  Ma- 
rion, Ky.     The  process  of  concentrating  sulfid  ores,  which  consists 
in  first  concentrating  the  ore  to  effect  a  substantially  complete  sepa- 
ration of  calcite,  and  thereafter  subjecting  the  purified  ore  to  fur- 
ther concentration  by  flotation  in  a  solution  adapted  to  react  upon 
the  ore  to  produce  bubbles  and  capable  of  reacting  upon  calcite. 
No.  988,737. 

844  Magnetic  Preparation  of  Ores. — Alfred  Arthur  Lockwood,  Lon- 
don, England,  assignor  to  Murex  Magnetic  Company,  Limited,  Lon- 
don, England.     In  the  magnetic  preparation  of  an  ore,  the  process 
which  consists  in  treating  the  ore  with  a  magnetic  substance,  an 
oily  liquid,  and  a  solution  of  a  sulfid  of  an  alkali  metal  and  mag- 
netically separating  the  mixture.     No.  996,491. 

845  Liquid    Ore    Separation. — Francis    I.    du    Pont,    of   Wilmington, 
Delaware.     The   process    of   separating   solids   of   different   specific 
gravities,  consisting  in  liquefying  anhydrous  antimony  bromid,  pass- 
ing the   mixture  to  te  separated  therethrough  and   separately  dis- 
charging   the    portions    which    float    and    those    which    sink.      No. 
1,014,624. 

846  Apparatus    for    the    WTet    Dressing    of    Sulfid    Ores. — Benjamin 
Sedgely  Smith,  of  Manly,  near  Sydney,  New  South  Wales,  Australia. 
An  apparatus  for  concentrating  and  classifying  sulfid  ores,  the  com- 
bination of  conducting  means  for  a  film  of  water,  means  for  dis- 
tributing ores  on  the  surface  of  the  film  of  water,  an  inclined  table 
provided   with   an   aperture   therein,   a   valve   controlled   receptacle 
open  to  and  in  water  tight  engagement  with  the  said  aperture  in 


MISSOURI    SCHOOL    OF    MINES.  79 

said  table,  and  a  drowning  box  interposed  between  said  conducting 
means  and  said  table  to  conduct  the  ore  carrying  film  of  water 
from  the  former  to  the  latter,  to  thoroughly  submerge  the  ore 
therein  whereby  it  sinks  into  said  receptacle  upon  reaching  the 
sam£.  No.  1,014,977. 

847  Process  of  Treating  and  Subsequently  Separating  Sulfid  Ores, 
etc. — Edward  James  Horwood,  of  Broken  Hill,  New  South  Wales, 
Australia.     The  process  of  separating  zinc  sulfid  from  other  sulfids 
associated  therewith  which   consists  in  superficially  changing  sul- 
fids  other  than   zinc   sulfids  by   subjecting  the   mass  to  heat,  and 
thereafter  separating  by  flotation,  the  heat-affected  particles  from 
those  unaffected.     No.  1,020,353. 

848  Art  of  Concentration  of  Mineral  Substances. — James  M.  Hyde, 
of   Basin,    Montana.      A    continuous    process    of    concentrating    the 
valuable   constituents   from  ore  pulps,   comprising   the   addition   to 
the   pulp   of   an   acid   precipitant   adapted   to   react   upon   the   ore, 
allowing  a  time  interval  to  elapse  prior  to  subjecting  it  to  the  sep- 
aration treatment,  then  subjecting  the  pulp  to  a  separation  treat- 
ment comprising  the  steps  of  adding  a  non-metallic  material  which 
will  preferentially  coat  the  valuable  particles  of  the  ore  and  sep- 
arating said  coated  particles  as  a  concentrate.    No.  1,022,085. 

849  Apparatus  for  Separating  Particles  of  Rubber  from  Materials 
with  which  they  are  Commingled. — William  Sullivan  Blaine,  of  Tor- 
reon,  Mexico,  assignor  to  Intercontinental  Rubber  Company,  of  New 
York,  N.  Y.,  a  corporation  of  New  Jersey.    Apparatus  for  separating 
particles  of  rubber  from  materials  with  which  they  are  commingled, 
said  apparatus   comprising  a,  flotation  tank, ~a  concentrating  table 
communicating  with  said  tank  at  one  end  thereof,  and  an  overflow  for 
the  flotation  tank,  so  arranged  as  to  maintain  a  shallow  covering  of 
water  upon  the  concentration  table.     No.  1,032,732. 

850  Method  of  Separating  Particles  of  Rubber  from  Materials  with 
which    they    are    Commingled.— William    Sullivan    Blaine,    of    Tor- 
reon,  Mexico,  assignor  to  Intercontinental  Rubber  Company,  of  New 
York,  N.  Y.,  a  corporation  of  New  Jersey.     The  method  of  separat- 
ing particles  of  rubber  from  materials  with  which  they  are  com- 
mingled, which  consists  in  separating  the  rubber  particles  by  flota- 
tion in  a  body  of  water,  and1  withdrawing  the  heavier  residues  or 
sinkers  into  an  auxiliary  substantially  quiescent  body  of  water  and 
under  such  back  pressure  as  will  substantially  prevent  re-entrance 
into  the  sinkers,  of  rubber  particles  that  have  been  released.     No. 
1,032,733. 

851  Process  of  Separating  Ores. — Alfred  Arthur  Lockwood,  of  Lon- 
don,  England,  assignor  to  Murex  Magnetic  Company,  Limited,  of 
London,   England.     A   process   which  consists   in   treating  the   ore 
with  an  oily  liquid,  water  and  with  a  silicate  of  an  alkali  metal  to 
modify  the  behavior  of  the  oil  toward  the  constituents  in  the  ore 
and  separating  the  oiled  constituents  from  the  unoiled  constituents. 
No.  1,043,850. 


80  MISSOURI    SCHOOL    OF    MIXES. 

852  Process  of  Separating  Ores,  etc. — Alfred  Arthur  Lockwood,  of 
London,  England,  assignor  to  Murex  Magnetic  Company,  Limited,  of 
London,  England.    A  process  which  consists  in  treating  an  oxidized 
ore  with  an  oily  liquid  and  water;   aiding  the  oiling  of  the  metal- 
liferous contents  of  the  ore  by  treatment  with  a  carbonate  of  an 
alkaline  metal  and  separating  the  oiled  constituents  from  the  un- 
oiled  constituents.     No.  1,043,851. 

853  Separation  of  Metallic  Sulfids  from  Sulfid  Ores. — Thomas  John 
Greenway,    of   Armadale,    near   Melbourne,    Victoria,   Australia,    as- 
signor to  Potter's  Sulphide  Ore  Treatment  Limited,  of  Melbourne, 
Australia,  a  corporation  of  Victoria,  Australia.     A  process  for  the 
separation  of  metallic  sulfids  from  sulfid  ores  which  consists  of  first 
intimately  mixing  finely  divided  particles  of  the  ore  with  a  small 
proportion   of  viscous  oil;    secondly,   feeding  the   oiled  ore  into   a 
heated   acidulated   solution;    thirdly,   skimming   or    floating   off   the 
coherent  buoyant  scum  of  gasified  oiled  sulfid  particles,  and  sep- 
arately   withdrawing    the    unoiled    sunken    gangue    particles.      No. 
1,045,970. 

854  Ore  Float-Separator. — Robert  Henry  Jeffrey,  of  Gabriel,  Mexico. 
An  ore-float  separator  containing  a  body  of  liquid,  means  giving  the 
effective   surface  of  the   liquid   conical   form,   a   centrally   disposed 
liquid  supply  delivering  the  liquid  radially  outward  in  all  directions, 
an  ore  distributer  above  the  liquid  and  adjustable  to  and  from  the 
liquid  surface,  and  means  for  imparting  rotary  motion  to  the  ore 
distributer.     No.  1,052,061. 

855  Process  for  Treating  Ores. — Carl   Schick,  of  Siegen,  Germany. 
A  process  of  treating  ore  slimes  which  consists  in  mixing  the  slimes 
with  a  chlorin  derivative  of  benzol,  agitating  the  mixture,  subjecting 
the  mixture  to  an  acid  bath,  and  permitting  the  settlement  of  the 
mixture.    No.  1,055,495. 

856  Apparatus  for  Separating  Minerals. — Alexander  Herbert  Smith, 
of  Glasgow,  Scotland.     The  combination  of  a  spitzkasten  having  an 
open  top,  a  concentrate  lip    and  a  straight  side  wall  having  a  slot 
lower  than  said  lip  and  remote  from  the  bottom  of  the  spitzkasten; 
a  pocket  surrounding  said  slot  and  provided  with  a  lip  higher  than 
said  slot  and  lower  than  the  concentrate  lip;  and  means  for  conduct- 
ing mineral  feed  into  the  spitzkasten.    No.  1,056,952. 

857  Ore  Mixing  and  Separating  Apparatus. — Alexander  H.  Smith,  of 
Glasgow,   Scotland.     An  ore  mixing  and  separating  apparatus,  the 
combination  of  a  mixer  casing  having  a  closed  sloping  top;   a  pro- 
peller fan  mounted  in  said  casing;    feed  means   for  a  material  to 
be  separated  and  a  frothing  reagent;    a  decanting  separator;    and 
a    sloping    conduit    of    greater    length    than    depth    communicating 
with  the  upper  part  of  the  casing  adjacent  to  the  uppermost  part 
of   said    sloping  top    and   discharging  beneath  the   water   level   of 
the  decanting  separator.     No.  1,058,111. 

858  Apparatus   for  Ore  Concentration. — James  Hebbard,  of  Broken 
Hill,  New  South  Wales,  Australia,  assignor  to  Minerals  Separation 
Limited,  of  London,  England.     Apparatus  for  concentrating  ores  by 


MISSOURI    SCHOOL    OF    MINKS.  81 

gaseous  flotation  of  certain  mineral  particles  in  liquid,  comprising 
in  combination  two  adjacent  mixing  vessels,  each  containing  a 
rotary  agitator  and  a  spitzkasten  placed  contiguous  thereto  having 
a  high  level  orifice  leading  from  the  first  mixing  vessel  to  the  spitz- 
kasten, and  a  low  level  orifice  leading  from  the  spitzkasten  to  the 
bottom  of  the  second  mixing  vessel.  No.  1,064,209. 

859  Method  of  Gravity  Liquid  Separation  of  Solids. — Francis  I.  du 
Pont,  of  Wilmington,  Delaware.     A  process  of  gravity  liquid   sep- 
aration of  solids,   which   consists   in   immersing   the   solids   to   be 
separated   in   a  volatile    gravity   liquid,    separately   removing   from 
the   bath   the   separated   constituents   of   different   specific   gravity, 
volatilizing  the  gravity  liquid  carried  off  by  each  constituent,  con- 
densing the  same  and  returning  the  same  to  the  separating  bath 
and  maintaining  the  circuit  of  the  liquid  carried  off  from  the  bath 
by  the  constituents  from  its  departure  from  the  bath  until  return 
to  the  bath  out  of  connection  with  the  air.     No.  1,064,459. 

860  Ore    Concentration. — Henry   Howard   Greenway,    of   Melbourne, 
Victoria,    and    Henry   Lavers,    of   Broken    Hill,   New    South   Wales, 
Australia,    assignors    to    Minerals    Separation   Limited,    of   London, 
England.     A  process  of  concentrating  ores,  which  consists  in  mix- 
ing   finely    divided    ore    with    water    containing    a    froth-producing 
e.ssential  oil,  agitating  the  mixture  to  form  a  froth,  and  separating 
the  froth.     No.  1,064,723. 

861  Apparatus  for  Gravity  Liquid  Separation  of  Solids. — Francis  I. 
du  Pont,  of  Wilmington,  Dela.     An  apparatus  for  gravity  liquid  sep- 
aration of  solids,  in  combination,  a  revolving  cylinder  adapted  to 
contain   the   separating   liquid,    conical   ends    projecting   from    said 
cylinder,  an  inner  peripheral  continuous  spiral  blade  in  said  cylin- 
der,  a   spiral   blade   formed   of   staggered    sections   in   one    conical 
section,  and  a  spiral  blade  formed  in  part  of  perforated  sections, 
and  in  part  of  staggered  sections  in  the  other  conical  section.    No. 
1,067,410. 

862  Ore  Concentration. — Edward  Hoit  Nutter,  of  Berkeley,  California, 
and   Henry  Lavers,  of   Broken  Hill,   New   South  Wales,  Australia, 
assignors  to  Minerals  Separation  Limited,  of  London,  England.     A 
process    for    concentrating    ores    which    consists    in    treating    the 
crushed  ore  by  a  flotation  process  two  or  more  times  under  dif- 
ferent conditions  to  obtain  froths  or  scums  having  the  constituents 
of  each  in  certain  ratios  of  size,  and  thereafter  subjecting  the  pow- 
dered mixture  contained  in  each  froth  to  a  classifying  step  to  sep- 
arate the  constituents.     No.  1,067,485. 

863  Ore-Concentrator. — Henry  Ellsworth  Wood,  Denver,  Colo.     The 
combination  with  an  inclined  vibrating  ore  concentrating  table,  of 
a   water   supply   or   feed   box   for  maintaining   a    stream   of   water 
across  the  table,  an  ore  feeding  device  adapted  to  deposit  the  ore 
in  a  finely  divided  state  upon  the  surface  of  the  stream  near  its 
source,  and  an  outlet  gate  at  the  edge  of  the  table  opposite  the 
feeding  device,  the   table  being  constructed  with  an  area  devoid 


82  MISSOURI    SCHOOL   OF    MINKS. 

of  riffles  adjacent  the  water  supply  box,  and  with  the  riffles  in 
the  direct  path  of  the  stream  modified  to  reduce  disturbance  of 
the  surface  conditions  of  the  water  flowing  over  them.  No.  1,071,850. 

864  Process   for  the  Treatment  and   Separation  of   Complex  Sulfid 
Ores. — Tormod    Reinert    Forland,   Broken   Hill,   New    South   Wales, 
Australia.      A    method    for    chloridizing    sulfid   ores,    of   zinc,    lead, 
iron,  copper,  nickel,  arsenic,  silver  and  the  like,  which  comprises 
treating  said  ore  with  chlorin  gas,  at  a  temperature  at  which  said 
metals,  with  the  exception   of  silver,   are  converted  into   chlorids, 
and  certain  of  said  chlorids  are  volatilized,  and  chlorid  of  sulphur 
is    formed    and    volatilized;    passing    said    volatiUzed    chlorids,    to- 
gether  with    any   remaining    chlorin    and    chlorid   of    sulphur,    and 
other  gases  into  a  contact  with  a  further  amount  of  said  ore,  at  a 
temperature  at  which  the  chlorid  of  sulphur  will  attack  said  metal 
sulfids,   and   form   chlorids   of  said   metals   except   silver,   and   free 
sulphur,  and  at  which  temperature  certainly  only  of  said  chlorids 
are  volatile.     No.  1,078,779. 

865  Ore     Concentration. — George     Albert     Chapman     and     Stanley 
Tucker,  of  London,  England,  assignors  to  Minerals  Separation  Lim- 
ited, of  London,  England.     A  process  for  concentrating  ores,  which 
consists  in  subjecting  to  agitation  and  to  the  action  of  a  selective 
agent  a  pulp  of  an  ore  containing  a  carbonate,  in  the  presence  of 
a  bisulfate  of  an  alkali  metal,  and  separating  the  selected  portion 
of  the  ore.     No.  1,079,107. 

866  Apparatus  for  Washing  Ore. — Hermann  Alexander  Brackelsberg, 
of  Hagen,  Germany.     In  a  float  separator  for  minerals,  a  plurality 
of  receptacles  adapted  to  overflow  into  one  another,  the  overflow 
walls   being  at   progressively   lower  levels,   and   each   overhanging 
the  surface  of  liquid  in  the  next  receptacle  at  an  angle  adapted 
to  cause   a   film   of  liquid  to  flow   along  the   overhanging   surface 
of  said  wall,  and  means  for  gently  feeding  the  material  and  liquid 
across  the  series  of  receptacles.     No.  1,080,886. 

867  Ore-Separator. — Charles    Henry    Brown,   Magdalena,   New   Mex- 
ico, assignor  to  the  Sherwin-Williams  Company,  Cleveland,  Ohio,  a 
Corporation   of  Ohio.     An  apparatus   consisting   of  a   combination 
of  a  liquid  tank;   a  plurality  of  spaced  rolls  in  the  tank  disposed 
alternately  above  and  below  the  designed  level  of  the  liquid,  the 
rolls  below  such  level  having  a  plurality  of  spaced  peripheral  ribs; 
a  movable  conveyor  extending  over  the  rolls  above  such  level  and 
under  the  rolls  below  such  level;  a  device  adjacent  an  end  roll  for 
feeding  material  to  the  conveyer  in  the  direction  of  its  movement; 
a  plurality  of  spreaders  respectively  disposed  transversely  of  and 
above  the  conveyer  adjacent  the  several  rolls  disposed  above  the 
liquid  level;   and  means  for  transversely  reciprocating  the  spread- 
ers.    No.  1,081,360. 

868  Apparatus  for  Ore  Concentration. — Walter  Broadbridge  and  Al- 
len   Crawford    Howard,    London,    England,    assignors    to    Minerals 
Separation  Limited,  London,  England.     Apparatus  for  carrying  out 
the  agitation-froth  process  of  ore  concentration  comprising  in  com- 


MISSOURI    SCHOOL    OF    MINES.  83 

bination  a  series  of  agitating  and  aerating  vessels,  a  series  of 
spitzkastens  contiguous  thereto  and  communicating  with  a  plural- 
ity of  the  said  vessels  at  various  points,  and  partitions  between 
the  spitzkastens  which  do  not  extend  up  to  the  liquid  level,  so  as  to 
leave  uninterrupted  surface  for  the  formation  of  the  froth.  No. 
1,084,196. 

869  Ore-Concentrator. — Henry    Ellsworth   Wood,    Denver,    Colorado. 
Apparatus   consisting  of  the  combination  with  a  settling  tank,  of 
a  rotating  drum  or  roller  submerged  to  near  its  top  and  having  a 
longitudinally   corrugated   surface,  the   corrugations  being  of  such 
form  as  to  carry  a  continuous  surface  film  and  means  for  depos- 
iting in  a  finely  comminuted  state  upon  the  exposed  portion  of  the 
drum,  the  ore  to  be  concentrated.     No.  1,088,050. 

870  Method  and  Apparatus  for   Ore  Concentration. — Howard  Hoyt 
Nutter,  New  York,  N.  Y.,  and  Theodore  Jesse  Hoover,  London,  Eng., 
Assignors   to   Minerals    Separation   Limited,   London,    England.      A 
method  of  concentrating  ores  by  the  formation  of  a  mineral-bear- 
ing froth  which   consists  in   causing  the  froth  as  it  is  formed  to 
pass  over  a  lip  below  the  level  of  the  free  air  surface,  causing  the 
body  of  the  pulp  to  pass  onward  to  further  treatment  without  pass- 
ing over  said  lip,  and  causing  the  more  permanent  froth  of  the 
froth  thus  separated  to  pass  over  a  second  lip.    No.  1,093,463. 

871  Process   for   Recovering   Metalliferous    Constituents    of   Ores. — 
Joseph  T.  Terry,  Jr.,  San  Francisco,  California.     A  process  which 
consists  in  the  subjection  of  metalliferous  particles  of  ores  existing 
as   carbonates,   oxides,   chlorids  and  sulphates,  to  the   action  of  a 
hydrogen-sulfid  gas,  then  subjecting  the  resulting  product  to  par- 
tial vacuum,  then  agitation  in  the  presence  of  an  oil-film-forming 
substance,   and   recovering  the   oil-film-forming  substance,   and   re- 
covering the  oil-coated  particles  by  flotation.     No.  1,094,760. 

872  Concentration  of  Ores. — Henry  Howard  Greenway,  Melbourne, 
Victoria,  Australia,  Assignor  to  Minerals  Separation  Limited,  Lon- 
don, England.     A  process  of  concentrating  ores  which  consists  in 
mixing  a  powdered  ore  with  neutral  water  containing  in  solution 
a  minute  quantity  of  an  aromatic  hydroxy  compound,  agitating  the 
mixture  in  the  cold  to  form  a  froth  and  separating  the  froth.     No. 
1,099,699. 

873  Process  for  the  Separation  of  Metallic  Sulfids  from  Gangue  and 
Apparatus    Therefor. — Leslie    Bradford,    Broken    Hill,    New    South 
Wales,    Australia,    Assignor,    by    Mesne    Assignments,    to    Minerals 
Separation  Limited,  London,  England.     A  process  of  concentrating 
ores,  which  consists  in  mixing  the  ore  with  water  to  form  a  flowing 
pulp,  adding  to  the  pulp  sufficient  acid  to  bring  about  the  evolu- 
tion of  gas  by  chemical  action  of  the  acid,  subjecting  the  pulp  and 
evolved  gas  therein  to  violent  agitation,  and  then  flowing  the  agi- 
tated pulp  away  from  the  place  of  agitation  and   separating  the 
floating  material.     No.  1,101,506. 

874  Ore    Concentration. — Henry    Howard    Greenway,    Clare,    South 
Australia,  and  Alfred  Henry  Piper  Lowry,  Prahran,  Victoria,  Aus- 


84  MISSOURI   SCHOOL  OF   MINES. 

tralia.  A  process  of  concentrating  metalliferous  ores,  which  con- 
sists in  subjecting  the  ore  to  the  action  of  a  chromium  salt  and  to 
flotation  separation  whereby  products  are  obtained  relatively  high 
in  certain  values,  and  other  products  are  obtained  relatively  high 
in  other  values.  No.  1,102,738. 

875  Ore     Concentration. — George     Albert     Chapman     and     Stanley 
Tucker,   London,   England,  Assignors   to   Minerals   Separation   Lim- 
ited, London.     A  process  for  concentrating  ores,  which  consists  in 
first  agitating  a  quantity  of  water  with  a  modifying  agent  out  of 
contact  with  the,  ore  so  as  to  form  an  air  emulsion,  and  thereafter 
adding  to  the  water  the  ore  to  be  treated  and  agitating  the  same 
therewith   so  as   to   form   a  froth    and   separating   the   froth.     No. 
1,102,873. 

876  Ore  Concentration. — George  A.  Chapman,  London,  England,  As- 
signor  to   Minerals    Separation   Limited,   London,    England,    a   Cor- 
poration of  England.     A  process  for  concentrating  ores,  which  con- 
sists in  grinding  the  ore  with  water,  in  the  presence  of  an  agent 
for  modifying  the  water,   so  that  the  agent  modifies  the  physical 
characteristics  of  the  water,  and   separating   the  floating  mineral. 
No.  1,102,874. 

877  Ore-Concentrating  Apparatus. — John  M.  Callow,  Salt  Lake  City, 
Utah,   Assignor   to  Metals   Recovery   Company,  Augusta,   Maine,   a 
corporation  of  Maine.     An  ore   concentrating   apparatus   having   a 
solution  containing  tank  and  a  porous  body  therein  through  which 
fine  streams  of  air  under  pressure  are  admitted  into  the  solution 
from  below,  a  means  operating  in  proximity  to  the  upper  surface 
of  said  body  for  maintaining  the  heavier  constituents  of  the  solu- 
tion in   suspension  to   thereby   prevent   the   blanketing   of   the   air 
outlets  of  said  porous  body.     No.   1,104,755. 

878  Apparatus  for  Liquid  Separation  of  Solids. — Francis  I.  du  Pont, 
Wilmington,  Delaware,  Assignor  to  International  Haloid  Company,  a 
Corporation  of  Delaware.     The  combination  with  a  tank  adapted  to 
hold  the   separating  liquid  having  an  outlet  from  which  the  sepa- 
rated constituent  is  discharged,  of  a  conveyer,  a  conduit  through 
which  the  conveyer  travels,  means  to  heat  the  conduit,  a  condenser, 
a  pipe  leading  to  the  condenser  from  the  conduit  at  a  relatively  hot 
part  of  the  latter,  a  vapor  discharge  from  the  condenser  and  a  pipe 
leading   from   the   vapor  discharge   to  the   conduit   at   a   relatively 
cool   part  of   the  latter,   and   means   to   deliver  material   from   the 
tank  outlet  to  the  conveyer,  said  tank,  conduit  and  condenser  being 
closed  against  direct  connection  with  the  external  atmosphere.     No. 
1,106,195. 

879  Separation  of  Zinc-Blende  and  other  Metalliferous  Constituents 
from  Ore  Concentrates  and  Slimes  by  Flotation  or  Granulation. — 
Edward  James  Horwood,  Broken  Hill,  New  South  Wales,  Australia. 
A  process  of  separating  sulfids,  the  method  which  comprises  extract- 
ing water   soluble    substances   from    a   material   comprising   a   plu- 
rality of  such  sulfids,  thereafter  submitting  to  a  heating  operation 
to  deaden  certain  of  such  sulfids  and  finally  separating  the  sulfids 
by  a  selective  wetting  operation.     No.  1,108,440. 


MISSOURI   SCHOOL  OF   MINES.  85 

880  Method  of  Concentrating  Ores. — William  Sydney  Stevens,  Mag- 
dalena,  New  Mexico,  Assignor,  by  Mesne  Assignments,  to  The  Ozark 
Smelting  and  Mining  Company,  Cleveland,  Ohio,  a  Corporation  of 
Ohio.     The  process  of  concentrating  ore,  which  consists  in  mixing 
together  at  a  temperature  of  not  less  than  60°C.  crushed  ore,  suffi- 
cient water  to  form,  a  flowing  pulp,   sulfuric  acid,   and  a  mineral 
oil    in    amount    only    sufficient    to    preferentially    coat    the    desired 
sulfids  particles  of  the  ore;  and  thereafter  presenting  the  pulp  to  the 
air  and  then  to  the  surface  of  a  liquid  to  cause  a  flotation  of  the 
oiled  sulfid  particles  by  surface  tension.     No.  1,116,642. 

881  Ore-Concentrating  Apparatus. — John  M.  Callow,  Salt  Lake  City, 
Utah,  Assignor  to   Metals   Recovery   Company,   Augusta,    Maine,   a 
Corporation  of  Maine.    An  ore  concentrating  apparatus  having  a  so- 
lution-containing tank  and  a  porous  medium  therein  through  which 
fine  streams  of  air  under  pressure  are  admitted  into  the  solution 
from  below,  a  means  operating  in  proximity  to  the  upper  surface 
of  said  medium  for  maintaining  the  heavier  constituents  of  the  so- 
lution in  suspension  to  thereby  prevent  the  blanketing  of  the  air 
outlets  of  said  porous  medium,  said  means  including  a  rotary  mem- 
ber adapted  to  beat  into  the  solution  the  air  diffused  by  the  porous 
medium,  and  means  for  rotating  said  member  at  a  high  speed.    No. 
1,124,853. 

882  Ore  Separatory  Apparatus.— John  M.  Callow  and  David  J.  Kelly, 
Salt  Lake  City,  Utah,  Assignors  to  Metals  Recovery  Company,  Au- 
gusta, Maine,  a  Corporation  of  Maine.     An  apparatus  of  the  com- 
bination  with  a  tank  adapted   to   contain   a  mixture   of   powdered 
ores  and  water  and  a  frothable  agent,  of  a  hollow  rotary  member 
operable  in  the  tank  and  adapted  to  receive  a  gaseous  fluid  under 
pressure,  said  member  being  sufficiently  porous  to  permit  the  pas- 
sage of  the  gaseous  fluid  therethrough  but  not  the  water  and  pulp. 
No.  1,124,855. 

883  Ore-Flotation  Apparatus. — John  M.  Callow,  Salt  Lake  City,  Utah, 
Assignor  to  Metals  Recovery  Company,  Augusta,  Maine,  a  Corpora- 
tion of  Maine.     An  apparatus  having  a  pulp-containing  tanK  and  a 
porous  body  therein  through  which  streams  of  gaseous  fluid  under 
pressure   are   admitted   into  the  solution   from   below,   said   porous 
body  permitting  the  passage  of  the  gaseous  fluid  but  not  pulp  and 
water,  and  a  reciprocable  carrier  mounted  in  the  tank  and  having 
elements   operating  in  the  proximity  to  the  upper  surface  of  said 
body  for  maintaining  the  coarser  constituents  of  the  solution  in  sus- 
pension to   thereby  prevent  the   blanketing  of  the   outlets  of  said 
porous  body.     No.  1,124,856. 

884  Process  of  Concentrating  Ores. — John  M.  Callow,  Salt  Lake  City, 
Utah,  Assignor   to   Metals    Recovery   Company,   Augusta,   Maine,   a 
Corporation  of  Maine.     Apparatus  for  separating  the  metalliferous 
from  the  non-metalliferous  ingredients  of  an  ore  mass,  the  combi- 
nation  of  a   pulp   receptacle,   means   for  forcing  substantially  uni- 
formly distributed  bubbles  to  the  surface  of  said  mass,  and  independ- 
ent means  for  exhausting  said  bubbles  from  the  upper  surface  of  the 
pulp.    No.  1,125,897. 


86  MISSOURI   SCHOOL   OF    MINES. 

885  Process  of   Treating  Ores.— Joseph  W.   Emerson,   Salida,  Colo- 
rado.    The  process  of  removing  blende  from  blende-containing  con- 
centrates which  comprises  submerging  a  body  of  such  concentrates 
in  a  relatively  deep  body  of  an  acid  solution,  mechanically  engag- 
ing said  particles  as  soon  as  they  rise  above  the  general  plane  of 
sucn  body   of  concentrates   and  immediately   removing  them   from 
the  acid  solution.     No.  1,126,965. 

886  Apparatus  for  Separating  Minerals  By  Flotation. — Bernard  Mac- 
Donald,  Los  Angeles,  California.    An  apparatus  for  separating  min- 
erals  by   flotation  comprising  a  receptacle,   a  launder   adjacent  to 
the  receptacle  into  which  the  material  passes  from  the  receptacle, 
a  vertically  disposed  transfer-pipe  within  the  receptacle  having  a 
lower  open  intake  end  and  an  upper  discharge  end,  a  pipe  entering 
the  lower  open  end  of  the  transfer-pipe,  means  for  supplying  com- 
pressed air  to  said  last  mentioned  pipe  and  means  for  supplying  oil 
to  said  last  mentioned  pipe.     No.  1,134,690. 

887  Flotation-Machine. — Charles  E.  Rork,  Douglas,  Arizona.     A  flo- 
tation separator  including  a  settling  tank  provided  at  its  sides  with 
overflow   lips,   an   agitation   chamber   extending   longitudinally   and 
centrally  of  the  tank  being  partially  immersed  therein  and  divided 
into  a  plurality  of  transverse  compartments,  each  compartment  be- 
ing  provided   at   one   side  with   an   inlet   opening  near  its   bottom 
and  at  its  other  side  with  an  outlet  opening  near  its  top,  such  open- 
ings   being   reversely    arranged    in    adjacent    compartments,    parti- 
tions  in   the   settling  tank   forming  chambers    which   communicate 
with  one  inlet  and  one  outlet  opening,  and  an  agitator  mounted  in 
each  compartment  of  the  agitation  chamber.    No.  1,136,485. 

888  Apparatus    for    the    Wet    Dressing    of    Sulfid    Ores. — Benjamin 
Sedgely   Smith,   Sydney,  New   South   Wales,  Australia.     In   combi- 
nation, a  surface  tension  separating  table  provided  with  means  for 
flowing  liquid  therethrough,  a  screen  thereover  adapted  to  deliver 
a  predetermined  size  of  material  to  the  table,  a  distributing  screen 
close  to  and  parallel  with  the  surface  of  the  liquid  on  the  table, 
interposed  in  the  path  of  material  dropping  from  the  primary  screen 
and  adapted  to  break  the  momentum  thereof.     No.  1,136,622. 

889  Flotation  of  Minerals. — Raymond   F.   Bacon,   Pittsburgh,   Penn- 
sylvania, Assignor  to  Metals  Research  Company,  New  York,  N.  Y., 
a  Corporation  of  Maine.     The  method  of  effecting  the  separation 
of  oxidized  ores  from  associated  gangue,  which  consists  in  subject- 
ing the  mixture,  in  a  finely  divided  condition,  to  the  action  of  a 
soluble  sulfid,  thereby  effecting  a  conversion  of  the  oxidized  ore  in- 
to sulfids,  and  then  converting  the  hydrogen  sulfid  present  into  con- 
stituents innocuous  to  flotation,  and  finally  subjecting  the  mixture 
to  flotation.     No.  1,140,866. 

890  Flotation   of  Minerals. — Raymond  F.   Bacon,  Pittsburgh,   Penn- 
sylvania, Assignor  to  Metals  Research  Company,  New  York,  N.  Y.,  a 
Corporation  of  Maine.    The  method  of  effecting  the  separation  of  oxi- 
dized ores  from  associated  ganguo,  which  consists  in  subjecting  the 
mixture,  in  a  finely   divided  condition,  to  the   action  of  a  soluble 
sulfid,  thereby  effecting  a  conversion  of  the  oxidized  ore  into  sul- 


MISSOURI   SCHOOL  OF   MINES.  87 

fids,  and  then  converting  the  hydrogen  sulfid  present  into  constit- 
uents innocous  to  flotation,  and  finally  subjecting  the  mixture  to  flo- 
tation. No.  1,140,866. 

891  Ore-Concentrating  Apparatus. — John  M.  Callow,  Salt  Lake  City, 
Utah,  Assignor,  by  Mesne  Assignments,  to  Metals  Recovery  Com- 
pany, a  Corporation  of  Maine.    An  apparatus  consisting  of  the  com- 
bination of  a  tank  or  receptacle  adapted  to  receive  ore  pulp  and 
a  substance  having  the  property  of  frothing  in  the  presence  of  a 
gaseous  medium  and  agitation,  a  casing  within  the  lower  portion 
of  the  tank  and  separated  therefrom  to  form  a  surrounding  space 
or  chamber,  a  body  of  porous  material  within  said  inner  casing  and 
supported  above  the  bottom  thereof  so  as  to  form  a  chamber  between 
said  porous  body  and  the  bottom  of  the  tank,  a  feed-pipe  terminat- 
ing in  the  lower  portion  of  the  tank  above  the  porous   body  and 
adapted   to   deliver  the  pulp   into  the   casing  above   said   body,   a 
pipe  leading  into  the  chamber  below  said  porous  body  and  adapted 
to  admit  a  gaseous  medium  under  pressure  thereinto,  said  porous 
body   subdividing  the   gaseous   medium   and  distributing  the  same 
irregularly  substantially  throughout  the  entire  surface  of  the  pulp, 
and  a  discharge  means  connecting  with  the  space  or  chamber  be- 
tween the  inner  casing  and  the  tank  and  adapted  to  deliver  there- 
from the  heavier  material  which  has  settled  into  said  space.     No. 
1,141,377. 

892  Separation  of  Mixed-Sulfid  Ores.— Henry  Lavers,  Surrey  Hills, 
Victoria,  Australia,  Assignor  to  Minerals  Separation  American  Syn- 
dicate   (1913)    Limited,    London,    England.      A    process    of   concen- 
trating metallic  sulfid  ores,  which  consists  in  subjecting  the  ore  to 
the  action  of  a  chromium  salt  in  a  slightly  alkaline  solution  and  to 
a  flotation  separation  in  a  heated  circuit  whereby  a  flotation  product 
relatively  high  in  certain  sulfids  and  a  residue  relatively  high  in 
other  sulfids  are  obtained.    No.  1,142,821. 

893  Process  of  Separating  the  Constituents  of  Rocks.— Gunnar  Sigge 
Andreas  Appelqvist  and  Einar  Olof  Eugen  Tyden,  Stockholm  Swe- 
den.    The  process  of  separating  constituents  of  rocks  by  the  aid 
of  oils  which  consists  in  treating  the  material  to  be  separated  in 
the  form  of  a  powder  in  dry  condition  with  oils  gasified  by  the  ap- 
plication of  heat,  repeating  at  will  the  said  treating  operation,  im- 
mersing the  material  thus  treated  into  a  liquid,  agitating  the  mass, 
and  allowing  the  different  particles  to  separate  from  one  another. 
No.  1,143,797. 

894  Concentration   of  Minerals  by  Flotation. — Archibald  R.  Living- 
ston, Canon  City,  Colorado,  Assignor  to  the  New  Jersey  Zinc  Com- 
pany, New  York,  N.  Y.,  a  Corporation  of  New  Jersey.     The  method 
of  separating  floatable  minerals  from  material  with  which  they  are 
associated,  which  consists  in  feeding  the  mixture  into  the  body  of 
water,   progressively  raising  it  through  the  surface   of  the  water 
at  an  angle  greater  than  its  natural  angle  of  repose,  meeting  the 
emerging  top  layer  by  a  downflowing  film  of  water,  and  floating  the 
top  layer  thereby  into  the  main  body  of  .water  at  the  surface  thereof 
and  collecting  the  material  thereby  separated  separately  from  that 
Which  sinks,     No.  1,147,633, 


88  MISSOURI   SCHOOL   OF    MINES. 

895  Ore  Separating  Process. — Arthur  J.  Moxham,  Wilmington,  Del- 
aware.    A  process  of  separating  solid  constituents  of  different  spe- 
cific gravities  in  a  heavy  liquid,  first  treating  the  solids  to  reduce 
the  specific  gravity  of  each  of  the  solid  constituents  to  the  extent 
required  to  cause  the  separating  liquid  to  have  the  desired  specific 
gravity  relative   to  the   specific  gravity   of  each   of  the   solid  con- 
stituents, and  then  effecting  the  separation  of  the  solid  constituents 
in  such  separating  liquid.     No.  1,151,117. 

896  Apparatus  for  Ore  Concentration. — Arthur  Howard  Higgins  and 
William   Warwick    Stenning,    London,    England,   assignors    to    Min- 
erals  Separation,   Limited,    London,    England.     Apparatus    for   con- 
centrating ores  by  gaseous  flotation  of  certain  mineral  particles  in 
liquid,  comprising,  in  combination,  a  vessel,  means  for  introducing 
a  gas  therein  at  the  lower  part  of  the  vessel,  means  for  producing 
a  zone  of  violent  agitation  and  gasification  in  the  lower  part  of  the 
vessel,  a  baffle  above  the  agitator  for  producing  a  quiescent  zone 
in   the  upper  part  of  the   vessel,   the  baffle   being   inclined   down- 
wardly from  the  inlet  side  to  the  outlet  side  of  the  vessel,  an  inlet 
for   the   pulp  to  the  vessel  below  the  baffle,  means  for  removing 
the  froth  from  the  upper  surface  of  the  liquid,  and  an  outlet  for 
the  residues  above  the  baffle.     No.  1,155,815. 

897  Apparatus   for  the   Concentration  of  Ores. — Thomas   Mackellar 
Owen,  Broken  Hill,  New  South  Wales,  Australia,  assignor  to  Min- 
erals Separation  American  Syndicate  (1913),  Limited,  London,  Eng- 
land.    An   apparatus    for   concentrating   ores    by    gaseous    flotation 
of  certain  mineral  particles  in  liquid,  a  single  upright  vessel  open 
at  the  top   comprising  both  an   agitation  and  a   separation  vessel, 
an  inlet  conduit  for  ore  pulp  at  the  bottom  of  the  vessel,  an  outlet 
conduit  for  tailings  near  the  top  of  the  vessel,  a  rotatable  agitator 
in  the  lower  part  of  the  vessel,  a  conduit  for  air  leading  into  the 
low.er  part  of  the  vessel,  vertically  elongated   baffles   immediately 
above    the    agitator    terminating    at    a    substantial    distance    below 
the  surface  of  the  liquid  in  the  vessel  for  producing  a  baffling  zone 
above  the  atomizing  zone,   and  a   substantially   quiescent   topmost 
and  separating  zone  above  the  baffling  zone.     No.  1,155,836. 

898  Ore  Concentration. — Louis  Albert  Wood,  London,  England,  as- 
signor to  Minerals  Separation  American  Syndicate  (1913),  Limited, 
London,  England.     A  process  of  concentrating  ores  which  consists 
in  subjecting  the  powdered  ore  suspended  in  water  free  from  froth- 
ing agents  to   the   admission   oT  gas,   forcefully   disseminating   the 
gas    through   the    pulp    in    such    a   way    that    the    gaseous    bubbles 
preferentially  attach  themselves  to   certain  mineral  particles,   and 
rise  toward  the  surface  and  discharge  their  mineral  load  with  the 
pulp,   and    catching   and    removing   such    discarded    mineral    below 
the  surface  of  the  liquid.     No.  1,155,861. 

899  Slime-Thickener  for  Dewatering  Mine-Tailings.— Wilton  E.  Dar- 
row,   Sutter   Creek,   California.     A  device   comprising  a  receptable 
having  a  central  inlet  pipe  extending  to  a  point  near  the  bottom 
thereof,  a  plurality  of  openings  in  the  side  of  said  receptacle,  an- 
other receptacle  disposed  around  said  first  named  receptacle,  said 


MISSOURI   SCHOOL  OF   MINES.  89 

openings  communicating  with  said  second  named  "receptacle,  and 
a  plurality  of  deflectors  arranged  in  said  first  named  receptacle. 
No.  1,156,276. 

900  Agitator  for  Ore  Treatment. — Cyrus  Robinson,  Mount  Vernon, 
New    York,    assignor    to    Metallurgical    Engineering    Process    Cor- 
poration, a  corporation  of  New  York.     In  an  agitator  for  ore  treat- 
ment, the  combination  of  a  receptacle  adapted  to  contain  a  mix- 
ture  of   solvent    solution    and    finely    divided    ore,    a   vertical   tube 
mounted  in  the  receptacle  and  terminating  at  its  lower  end  above 
the  bottom  of  the  receptacle,  an  air  nozzle  at  the  bottom  of  the 
receptacle  below  and  closely  adjacent  the  lower  end  of  the  tube, 
means  for  delivering  air  to  the  nozzle  to  agitate  the  mixture  in 
the   tube  and   force    it   upward   therethrough,   means   supplemental 
to  the  receptacle  for  receiving  the  mixture  from  the  upper  end  of 
the  tube,  and  means  for  entering  the  nozzle  to  cut  down  the  ef- 
fective cross  area  thereof.     No.  1,156,372. 

901  Process   of   Extracting   Metals   from   Ores. — Robert   S.    Towne, 
New    York,    and   Cyrus   Robinson,    Mount   Vernon,    New   York,    as- 
signors to  Metallurgical  Engineering  &  Process  Corporation,  a  cor- 
poration of  New  York.     A  process  for  effecting  the  separation  of 
soluble  values  from  a  mass,  it  consisting  in  subjecting  the  mass  to 
the  action  of  a  solvent  solution  of  comparatively  high  dissolving 
efficiency  for  a  comparatively  short  period  of  time,  positively  and 
actively  agitating  the  mass  and  the  solution  during  the  said  period, 
subjecting  the  mass  to  a  positive  and  active  dehydration,  thereby 
withdrawing  from  it  a  major  portion  of  the  solution  together  with 
the   dissolved  values   contained  therein,   subjecting  the   remaining 
mass  to  the  action  of  a  similar  solvent  solution  of  comparatively 
low  dissolving  efficiency  for  a  comparatively  long  period  of  time, 
positively  and  actively  agitating  the  mass  and  the  solution  during 
the    said    period,    subjecting    the    mass    to   a    second    positive    and 
active  dehydration,  thereby  withdrawing  from  it  a  major  portion 
of   the   second   solution    together   with   the   dissolved   values    con- 
tained therein,  and  extracting  the  dissolved  values  from  each  of 
the    said    withdrawn    solutions    independently    of    the    other.      No. 
1,156,382. 

902  Separation  of  Metallic   Sulfids   from  Ores. — Thomas   Mackellar 
Owen,   Sydney,  New  South  Wales,  Australia,  assignor   to  Edward 
William  Culver,  Sydney,  New  South  Wales,  Australia.     In  selective 
or   preferential  froth   flotation  separation  of  metallic   sulfids   from 
slimes,   a  process  for  augmenting  the  flotative   quality  of  certain 
sulfids  in  relation  to  certain  other  sulfids,  which  consists  in  adding 
to  and   agitating  with  the   pulp   a   limited   proportion   of   alkaline 
permanganate.     No.  1,157,176. 

903  Separation     of     Minerals     by     Flotation. — Lewis     G.     Rowand, 
Brooklyn,    N.    Y.,    assignor    to    New    Jersey    Zinc    Company,    New 
York,  N.  Y.,  a  corporation  of  New  Jersey.     The  method  of  separat- 
ing   sulfid    constituents    from    ores    in   which    they    are    contained, 
which  comprises  feeding  the  solid  particles  of  the  ore  in  a  finely 


90 


MISSOURI   SCHOOL  OF   MINKS. 


divided  condition  upon  a  moving  layer  of  an  oleaginous  liquid  hav- 
ing a  selective  action  for  the  sulfids  of  a  character  to  effect  flota- 
tion, progressively  feeding  said  layer  with  its  charge  of  ore  into  a 
flotation  liquid  at  the  surface  thereof,  and  floating  off  and  recovering 
the  floating  sulfids.  No.  1,159,713. 


MISSOURI    SCHOOL   OF    MINES.  91 

NAME  INDEX  TO  PATENTS 

(Numbers  refer  to  items  and  not  pages.) 

Allen,    A.   A 759 

Appelqvist,  G.  S.   A 744,  893 

Bacon,   Raymond   F 889,  890 

Ballot,   J 705-707,    712,    713,   715,   724,    809,   811,    823 

Behrend,   Samuel   K 841 

Elaine,    William    S 849,  850 

Brackelsberg,    H.    A 866 

Bradford,    Hezekiah    747 

Bradford,    Leslie    873 

Broadbridge,    Walter    742,  868 

Broken  Hill  Proprietary  Company,   Ltd. 774 

Brown,    C.    H '. 867 

Brown,   C.    T 751 

Brumell,  Henry  Peareth  Hawdon 757 

Callow,    John    M 877,  881-884,  891 

Cattermole,    A.    E 687,  690,  691,  773,  784,  785,  790 

Chapman,    G.    A 715,  739,  740,  865,  875,  876 

Chemical    Development    Company 839 

Crowder,    S 678,  753 

Culver,   E.    W 902 

Darling,    J.    D 776,  794 

Darrow,    W.    E 899 

Davis,    J.    H 758,  805 

Debavay,    A.    J.    F ^ 699,  703,  616,  828 

Delprat,    G.    D 685,  686,  692,  G94,  765,  774,  778 

Dick,   F.   B 729 

Du  Pont,  Francis   1 836.   845,   859,    861,   878 

Elmore,    A.    S 680,  688,  708,  717,  760,  761,  762,  821 

Elmore,  F.  E 679,  698,704,717,  754,  756,  808 

Emerson,  J.  W 885 

Everson,  C.  J 750,  751 

Finley,  F.   B 791,  806 

Foote,  A.  D 768 

Forland,  T.   R 864 

Froment,    A 683 

Gale,  Denis  755 

Gillies,  J.  H 700,  786,  787 

Glogner,  M.  F.  R 766 

Good,  I.   F 769 

Goyder,    G.    A 689,    775,    788 

Gray,  R.,  Jr 746 

Greenway,  H.  H 730-732,  838,  860,  872,  874 

Greenway,  T.  J 853 

Harris,  J.  H 769 

Haultain,  H.  E.  T 682 

Hebbard,  J 741,  858 

Hebron,  C.  B -. 750,  751 

Higgins,  A.  H 719,  724,  745,  838,  896 

Hockley,  E.  A 748 


92  MISSOURI    SCHOOL    OF    MINDS. 

Hoover,   T.  J 725,  727,  832,  842,  870 

Horwood,  E.  J 721,  878,  879 

Howard,  A.  C 742,  868 

Huff  Electrostatic  Separation  Company 831,  837,  840 

Hutchinson,  M.  W 751 

Hyde,  J.  M 848 

Intercontinental  Rubber  Company 849,  850 

International  Haloid  Company 878 

Jamieson,   W 770 

Jeffrey,  R.  H 854 

Jones,   A.   E 746 

Kelly,  D.  J 882 

Kendall,  Cosmo  780 

Kirby,  E.  B 803,  812 

Latimer,  J.  F 814,  815 

Laughton,  E 689,  775,  788 

Lavers,  Henry    732,  733,  860,  862,  892 

Lindley,  C.  N 777 

Livingston,   A.   R 894 

Lockwood,  A.  A 718,  722,  728,  736-738,  830,  834,  835,  844,  851,  852 

Lowry,  A.  H.  P 874 

MacDonald,  Bernard   886 

Macquisten    A.    P.    S 702,    709,    818-820 

Metallurgical  Engineering  Process  Corporation 900,  901 

Metals  Recovery  Company 877,  881-884,  891 

Metals   Research   Company : 889,  890 

Minerals    Separation   Limited 733,  734,  740-742,  745,  811,  826,  832,  833, 

842,  858,  860,  862,  865,  868,  870,  872,  873,  875,  876,  896 

Minerals  Separation  American  Syndicate  (1913)  Limited 892,  897,  898 

Moxham,  A.  J 895 

Murex  Magnetic  Company,   Limited 728,  736-738,  834,  844,  851,  852 

Xaillen,  E.  L.  V 767 

New  Jersey  Zinc  Company 894,-  903 

Nibelius,  A.  W 752 

Xorris,  D.  H 817,  822 

Nutter,  E.  H 733-735,  862,  870 

Odling,  F.  J 770 

Ore  Concentration  Company  (1905),  Limited 821 

Orr,  H.  L 771,  791 

Owen,  T.  M 897,  902 

The  Ozark  Smelting  &  Mining  Company 880 

Pettinos,  G.  F . . .   769 

Picard,  H.  K 690,  693,  696,  705-707,  712,  713,  71  R.  7?o.  7'>r  726.  785. 

790,  793,  809,  811,  823 

Pohle,  E.  C 804 

Potter,  C.  V 681,  782 

Potter's  Sulphide  Ore  Treatment,  Limited 853 

Ramage,  A.  S 839 

Rice,  B.  W 792 

Robinson,  Cyrus 900,  901 

Robson,  G 678,  753 

Rork,  C.  E 887 

Ross,  M.  P..  772 


MISSOURI    SCHOOL   OF    MINES.  93 

Rouse,  A.  M 749 

Rowand,    J.    T 746 

Rowland,  L.  G 903 

Ruthenburg,  Marcus  829 

Samuel,  M.  R.  A 718,  722,  830,  834 

Sanders,  W.  M 796,  827,  843 

Saunders,  R.  E 711 

Schammell,  J.  B 684,  779 

Schick,  K 743,  855 

Schwarz,  A 701,  777,  797-802,  807,  813 

Schwarz,  Alice  H 781 

Schwarz  Ore  Treating  Company 781,  797-802,  807,  813 

Sherwin-Williams  Company    867 

Smith,  A.  H 856,  857 

Smith,  B.   S 846,  888 

Stenning,  W.  W 896 

Stevens,  W.  S 880 

Stovel,  H.  R 682 

Sulman,  B.  A 714,  826 

Sulman,   H.   L 690,  693,  696,  705-707,  710,  712-716,  720,  723,  726,  785, 

790,  793,  809-811,  823,  826,  833,  838 

Terry,  J.  T.,  Jr 871 

Towne,   R.   S 901 

Tucker,  S 739,  740,  865,  875 

Tunbridge,  John  783 

Tunbridge,   Virginia    783 

Tyden,  E.   O.  E 744,  893 

United  States  Graphite   Company 758 

Van  Meter,  J.  W Tr- 772 

Ward,  C.   H 795 

Wentworth,  H.  A 831,  837,  840 

Wheelock,  C.  F 764 

Williamson,  G.  R 749 

Wolf,    J.   D 695,  697,  789,  824,  825 

Wolf,  J.  W 763 

Wood,  H.  E 863,  869 

Wood,   L.   A.  .  898 


94  MISSOURI   SCHOOL  OF    MINES. 

AUTHOR-SUBJECT  INDEX 

(Numbers  refer  to  items  and  not  to  pages.) 

Absorption    553,    556 

Acid  flotation 85.  104,  199 

Acid-Gas    flotation 393 

Adams,  W.  J 47    48 

Adsorption 556,  588 

Adsorption    phenomena 584 

Agitation  froth  process 326 

Air-froth 517 

Alexander,    Jerome    557 

Allen,    A.    W 558 

Allen,    G.    L 424,  526 

Amalgamated  Zinc   Co 138,  139,  171,  172,  182,  202,  251,  341 

American  Direct  Concentration  Co 118 

American  Ore  Flotation  Co 461 

Anaconda    Mine     335,  402,  429,  466,  476,  485 

Antimony  ore    14,  308 

Arentz,  S.  S 404,  488 

Ashcroft,  J.  W 252-255 

Ashley,   H.    E 559,  560 

Bains,  Thomas  M 423 

Ballot,   Webster,   Litigation 555,  636 

Bancroft,  W.   D 561-564 

Barclay,  A 140 

Barker,   J.    T 578 

Barr,   James   A 4 

Bartlett,  J.  C 565 

Bastin,  E.  S 203 

Bathurst,  F.   H 49 

Belchic,  George   424,  530 

Bennett,   W.    E 141 

Benson,  Clara  C 566 

Bergwerks  Wohlfahrt    399 

Bevan,  John  373 

Billitzer,  Jean   567,  568 

Bisbee  ores    392,  471,  513 

Bismuth  ore  308 

Block,  James  A 425 

Blyth,  W.  B 426,  427 

Bornstein,  Richard    532 

Bousqupt,    G ?1  °-    311 

Boys,    C.    V 533,  569 

Bradbury,  Robert  H 570 

Braden  Copper   Co 256,  331,  371,  441 

Bradford  process  428,  498 

Bretherton,    S.    E .- 488 

Briggs,  Henry   374 

Briggs,  T.  R , 571,  572 

Britannia  Mining  and  Smelting  Co 322 

British  Ore  Concentration  Syndicate 30 

British  Ore  Concentration  Syndicate,  Litigation 621,  634,  65§ 


MISSOURI   SCHOOL  OF   MINES.  95 

British  Ore  Concentration  Syndicate  vs.  Minerals  Separation  Ltd. — 

619,  636,  659 

British  Ore  Concentration  Syndicate  vs.  Webster  Ballot  et  al 636 

Broken  Hill  (N.  S.  W.)  District 6,  16,  24,  27,  49,  58,  59,  69-71,  74 

76-78,  84,  86,  89,  90,  115-117,  121,  122,  130,  138,  139,  142,  148,  156,  160 

162,  163,  166,  170-172,  174,  178,  182,  184,  195,  200,  202,  204-211,  216,  229 

230,  233,  238,  245,  251,  285,  309,  312,  328,  329,  340,  349,  350,  351,  363 

365,  367,  368,  390,  418,  420,  430,  453,  475,  477 

Broken  Hill  Proprietary  Co.,  Ltd.,  Litigation  636 

Brown,  A.   Selwyn,  see  Selwyn-Brown,  A. 

Burro  Mountain    375 

Bush,  F.  V 375 

Butte  and  Superior  Copper  Co 266,  294,  300,  313,  314,  385,  409 

Butte  and  Superior  Copper  Co.,  Litigation 630,  645,  647,  663 

Butters,  Charles   431,  432,  503 

Gaetani,  Gelasio   573 

Callow,  J.  M 433-436,  480,  519 

Callow  machines 479 

Callow  process 394,  433-437,  45.6,  457 

Callow  tanks   335 

Cameron,  Frank  K 500,  574 

Campbell,  D.  G 315,  450 

Canada  Zinc  Commission 5 

Capillarity    554,  611,  617 

Carbolic  acid    467 

Carnotite  ores  258,  319,  405 

Carthew,  J 172 

Cattermole   process    10,  250,  350,  498 

Caucasus  Copper  Company 143 

Central  Mine   rrv 214,  477 

Channing,   J.   Parke 330,  376 

Chapman  and  Tucker  process 377 

Cheticamp,  Cape  Breton 57 

Chile  347 

Clay,  Colloid  matter  in. 559,  560 

Clay  washing 10 

Clark,  Donald   6,  50,  51,  1*4,  173,  174 

Clarke's  process 207 

Claudet,  H.  H 60,  111 

Clausthal   407 

Clennell,  J.  E 432 

Clifford  Dry  Concentrating  Co 382 

Coal  tar 467,  490 

Cobalt  ores 392,  471,  472 

Cobar  Gold  Mine   167,  168,  321,  334 

Coeur  d'Alene   239,  287,  338,  394,  458,  486 

Cohn,  Jesse  E • 379 

Collins,  George  E 378,  439 

Colloidal  mixtures    • . .  595 

Colloids     ..535,  540,  544,  548,  550,- 551,  553,  557-560,  563,  566-57Q,  573,  575 

579,  58G,  589,  594,  603,  606,  613,  615 

Colloids,  Bibliography 531 

Colorado  School  of  Mines  Plant 454 

Coolgardie  field 230 


196 


MISSOURI    SCHOOL    OF    MIXES. 


5  Coniagas  silver  ore  .................................................   472 

co  Conservation    .....................................................   452 

5  Consolidated  Arizona  Smelting  Co  ..........................  391,  462,  521 

I  Copper  ores    .....  47,  68,  72,  109,  110,  141,  143,  180,  252-256,  282,  305,  308 

313,  314,  320,  323,  324,  328,  331,  332,  371,  388,  434,  440-442,  459,  463,  464 

467,  487,  491,  521 
I   Cordoba  Copper  Mine  ......................................  290,  292,  295 

1    Corliss,    Harry    P  .................................................   576 

!    Costs   .................  .  ...........................  4,  399,  405,  519,  521 

j    Coutts,  J  .........................................................   443 

Crane,  Walter  R  ...................................................       1 

Criley  and  Everson  process  ........................................     13 

Cripple  Creek  .........................................  .  ...........   455 

Croasdale,  Stuart   .................................................   620 

Crocker,   J  ........................................................    213 

Cyaniding  .....................................................  384,  451 

Darrow,  Wilton  E  .................................................     87 

Data  ..........................................................  532,  543 

Data,  Classification  of  ...........  ..................................   530 

Debavay  process  ......  10,  70,  74,  79,  88,  114,  116,  117,  138,  139,  145,  170- 

172,  176,  182,  202,  228,  251,  261,  28G,  340,  364,  368 
Debavay  process,  Litigation    ..............................  629,  638,   668 

Debavay    vs.    Macquisten    ...................  •  .....................   636 

«3       Delprat    process     .......  6,  8,  10,  33,  34,  38,  44,  50,  70,  74,  79,  88-90,  104 

•3  115,  116,  124,  328,  660 

Descroix,    L  ......................................................    146 

Devaux,  H.  E  .....................................................   577 

g       Diamond    recovery    ...............................................     63 

Dispersoid  chemistry,  see   Colloids. 

Divine,    R.    D.  .  .  .  .................................................   488 

Dolcoath,  Cornwall   ............................................  109,  113 

Donaldson,    R.    J  ............................................  •  ____   214 

Donnan,    F.    G  .....................................................   578 

Donnan    pipette    ..................................................   539 

Dorr    machines     ..................................................   520 

Dreibrodt,     0  ....................................................   262 

Drucker,    A.    E  ..........................................  .  ........   444 

Drucker,    K  ......................................................    542 

Durell,    C.    T  .............................................  263,  445,  446 

Easton,    W.    B  ....................................................   447 

Eddingfield,   F.   T  .................................................   316 

Electrical    theory     ............  ....................................   423 

Electromagnetic    process     .....................................  :.  .  .     81 

Elm    Orlu     Mine  ...................................  .  ......  385,  389,  508 

Elmore,    A.    S  .............................  52,  61,  G2,  91-94,  147-149,  216 

Elmore  vs.  Ballot  .............................  ....................   655 

Elmore  vs.  Minerals  Separation,  Ltd  ................................   636 

Elmore  vs.  Sulphide  Corporation   ..................................   632 

Elmore    patents,    Litigation.  ..  -621,  624,  625,  627,  634,  641,  646,  651,  657 

658,  675 
Elmore   process    ........  10,  12,  14,  18,  19,  21-23,  25,  28,  29,  36,  40,  42,  43 

60,  62,  63,  66,  67,  88,  91-98,  106,  108-111,  116,  117,  119-121,  123,  126,  129, 
133,  134,   137,   140,   141,  146-150,   152,  156,   160,  167,  170,  179,  181,   206 
216,  232,  243,  246,  249,  257,  264,  293,  295,  296,  317,  368,  376,  489 


MISSOURI   SCHOOL   OF   MINES.  97 

Elmore  process,  see  also  Vacuum-flotation, 

Emulsification    ,. 564 

Emulsions    • '. 571,  572,  592 

Engels  Mine  501 

Eucalyptus  oil   • 217-219,  345 

Everson,  Carrie  J 8,  439,481 

Falkenberg,  Otto 318 

Farrier,  Val 340 

Federal  Lead  Co 419 

Federal  Mill 355 

Federal  Mining  and  Smelting  Co 225,  34l 

Fields  Electric  Flotation  Co 491 

Finlay,  Alex 534 

Fir  oils 467 

Fischer,  Siegfried  319 

Flat   River  District 388 

Fleming,  J.  A. 449 

Flotation    Processes,    Bibliography 1-3 

Foams 339,  535,  566,  605 

French,  Herbert  J 392,  471,  472,  513 

Freundlich,  Herbert 535 

Friedrichssegen  Mine 277 

Froment    patents,    Litigation     647 

Frost,  G.  J 393 

Froth  process 267,  326,  344,  473,  510,  516,  517,  605 

Fuel  oils    467 

Gahl,  Rudolf 474 

Galbraith,  C.  S 475 

Gallenkamp,   W 600 

Garrison,  Fielding  H ^ 579 

Garver,  M.  M 580,  581 

Gayford,  Ernest 394 

General  Engineering  Co 425 

General   Exploration   Co 491 

General  Naval  Stores  Co 469 

Getman,  F.  H 536 

Gibbs,  J.  W 537,  538,  579 

Gibb's  theory   537,  578,  579 

Gibson,  A.  H 582,  583 

Gillies'  process   88,  99,  116,  117 

Glasdir  Copper  Mine  23 

Globe-Miami .... 456 

Godfrey,  J.  R 24,  27,  38 

Gogo  juice 316,  333 

Golconda,  Nevada 118 

Gold-Copper  ore 324 

Gold  Hunter  Co 457,  458 

Gold  King  Mine 497 

Gold  ore   87,  167,  168,  282,  308,  316,  333,373,  406,  426,  427 

431,  444,  497 

Gcipner,  C .  100,  119-122,  129 

Granulation  process 70 

Graphite 127,  154,  203,  308,  343 

Greenway,  T.  J 16 


98  MISSOURI   SCHOOL   OF   MINES. 

Greenway  process    498 

Greenway  and  Lowry  process 395 

Guess,  H.  A 222 

Haglund,  G.  . .  • \L01 

Hamilton,  J.  F 53 

Hancock  jig  355 

Harris,  J.  E • 584 

Hatschek,  E 555 

Haultain,  H.  E.  T 585 

Hayden,  Ralph 335 

Haywood,  Bryan   123,  129 

Hebbard,  James 477 

Herwegen,  Leo    268,  269,  302 

Heym,  Ingenieur 396 

Hiendelaencina  (Spain)  District 327 

Historical  sketch 436 

Hofstrand,  O.  B 271,  336,  342 

Holmsen,  Holm   183 

Holtmann,  —     - 271 

Hoover,   H.  C 152 

Hoover,   T.   J 2,   7,   184-186,   272,    337 

Hoover  process   187 

Horwood,  E.  J 397 

Horwood  process    142,  144,  153,  172-174,  177,  181,  188,201,  244,  249 

273,  359,  390,  397,  398,  413,  417,  418,  420,  478,  498 

Horwood,  E.  J.  Litigation 638 

Hyde,  J.  M 399,  622,  623,  626,  630,  631,  636,  639,  640,  644,  647, 

663,  670,  671,  677 

Hyde  Process  274,  294,  480 

Hunter  Mining  Co 458,  479 

Huntington,  A.  K 73,     78 

Huston,  George  338,  523 

Ingalls,  H.  W 479 

Ingalls,  W.  R 65,  74,  102,  103,  124,  125,  223 

Independence  Plant  455 

Inouye,  Tadashiro    275 

Inspiration  Mine  320,  456,  459,  470,  474 

Jackson,   F.   H 104 

Jaff e,  Richard  339,  344 

James,  J.  C 340 

Jamison,  R 586 

Janek,  A 540 

Japan,  flotation  in  zinc  ores • 275 

Joplin  District •  382,  400 

Joplin-Galena  Slime  424 

Joplin  Separating  Co • 247 

Keedy,  Dyke  V 401 

Kendall  Graphite  Process 154 

Kenrick,  Frank  B.. 587 

Kenyon,  W.  Houston  517 

Kirby,  E.  B 75 

Kithil,  K.  H 405 

Kohlrausch,    Friedrich 541 

Kuchs-Laist  Centrifugal  Separator 335 


MISSOURI   SCHOOL   OF   MINES.  99 

Kyloe  Copper  Mine • .  252-255,  305,  323 

Laist,  Frederick 402 

Landolt-Bornstein   532 

Laughlin,  J.  P.  M 480 

Lavers  Process    498 

Le  Roi  No.  2,  Ltd 28,  60,  66 

Lead  Ores 89,  185,  215,  303,  312,  352,  379,  388 

Leuschner  Process 271,  276,  277 

Levy,  Ernest 155 

Lewis,  W.  C.  M 588 

Linde,  R 126,  129,  156 

Liquid  jets 445 

Litigation   618-677 

Liwehr,  A.  E 403 

Lloyd  Copper  Co 482 

Louis,  Henry 8 

Low,  V.  F.  Stanley 482 

Lowry  Process 498 

Ludwigseck  Mine   , 277 

Luther,  R 542 

Lyon,  D.  A 488 

Lyster  Process 249,  329,  359 

Lyster  Process  Litigation 638 

McClave,  J.  M 278,  483 

McDermott,  Walter  17,  26,  37,  55,  190 

McPherson,  R.  H • 589 

Macquisten  Process    10,  102,  105,  118,  125,  132,  165,  181,  191,  220 

224,  225,  270,  279,  280,  336,  341,  342,  471,  480 

Macquisten  Process   Litigation    636,   638 

Magnetic  Separation ^- 6,  238,  247 

Marie,  Ch 543 

Marvin,  Henry  A • .   484 

Mary  Murphy  Mine 378,  401,  411,  492 

Mathewson,  E.  P 485 

Measurements,  Physical    539,  541 

Megraw,  H.  A 486,  487,  524 

Menendez,  J 357 

Mercury  ore   , 308 

Meuskens,  Cl 282 

Mexican  practice    465 

Miami  Copper  Co.,  Litigation 639,  650,  667,  670 

Mickle,  K.  A , 226,  227,  283-285 

Mill  design 529 

Miller,  B.  L 343 

Miller,  W.  L 589 

Milne,  David    24,  27,  38 

Minerals    Separation    Ltd.,    Litigation 619,  627,  629,  630,  636,  638,  642 

643,  645,  651,  659,  661,  664,  674 

Minerals  Separation  Ltd.,  process 8,  10,  88,  116,  117,  131,  160,  170,  172 

206,  208,  211,  218,  228,  236,  243,  249,  253,  256,  257,  282,  286,  295,  302,  305 
320-322,  324,  328,  332,  334,  346-349,  353,  360,  363,  364,  366,  368,  376,  389 

441,  456,  494,  505,  508,  517 
Minerals  Separation    Ltd.,  vs.  British  Ore  Concentration  Syndicate, 

621,  634,  658 


100  MISSOURI   SCHOOL  OF  MINES. 

Minerals   Separation     Ltd.,   vs.  Debavay 668 

Minerals  Separation   Ltd.,  vs.  Elmore 641,  646 

Minerals  Separation    Ltd.,  vs.  Hyde 622,  623,  626,  627,  630,  631,  636 

Minerals  Separation   Ltd.,  vs.  Miami  Copper  Co 639,  650,  667,  670 

639,  644,  647,  663,  671,  677 

Minerals  Separation    Ltd.,  vs.  Ore  Concentration  (1905) 649 

Minerals  Separation,  Ltd.,  vs.  Potter 648 

Minkowski,  H 590 

Mitchell,  D.  P 231 

Mitsui  Mining  Co 275 

Moldenhauer,  Max 232,  288,  289 

68fr  '808  '902  'ZSZ  'ISZ  '623  'WZ  '19  '68  '62 umuapq^opM 

Moore,  R.  B 405 

Morning  Mine   341 

Motherwell,  William   406 

Mt.  Morgan 406 

Mueller,  W.  A 490 

Mukhopadhyaya,  Jnanendranath   591 

Miiller,  A 444,  531 

Mullan,  Idaho   457  458,  480 

Murex  Magnetic  Co.,  see  Murex  process. 

Murex    process     15,  155,  157-159,  161,  172,  189,  192,  209,  233,  249,  290 

291,    292,   295,   318,    354,    372,    399,   407,  408 

Murex  process,  Cost   399 

Murex  process,  Litigation   638 

Murgne  Gorge   143 

National  Copper  Co 394,  480 

Newman,  P.  R 592 

Newman,  J.  M 349-352 

Newton,  P.  M 9,  234,  235 

Nicolai,  G 593 

Nicholas,  P.   C 127 

Norris,  Dudley  H 653 

Noyes,  Arthur  A 594,  595 

Nutter,  E.  H 236 

Nutter  process    498 

Ohio  Copper  Co 491 

Old  Dominion    494 

Oil-  and  Acid-Flotation  276 

Oil  films  596 

Oil  flotation 4,  17,  20,  22,  26,  28,  32,  35,  36,  37,  40,  41,  43,  45,  46,  48. 

55,  67,  75,  80,  87,  129,  179,  184,  185,  194,  198,  238,   252,   294,  295,  300 

353,  362,  400,  409,  433,  447,  476,  480,  481,  483,  493,  509,  512,  516,  654 

Oils    435,  468,  469 

Oils,  see  also  names  of  different  kinds  of  oils. 

Oils,  Testing 10,  443,  514 

Ore  Concentration  Syndicate 22,  29,  160,  168,  237 

Ore  Concentration  Syndicate,  Litigation 649,  656,  657 

Ore  Concentration  Syndicate  vs.  Sulphide  Corporation 637,  652 

Ore  Concentration  Syndicate,  see  also,  Elmore  process. 

Orijarvi  Mine,  Finland 248 

Ostwald,  W 538,  545,  553 

Ostwald-Luther    542 

Pape,  W.  A.  C.. .                                                                                                   .  597 


MISSOURI  SCHOOL  OF  MINES.  101 

Parmelee,  H.  C 297,  411 

Partington,  J.  R 546 

Patent  law 628 

Patents    9,  235 

Patents,  List  of 678-903 

Patents,  1915   525 

Pegg,  A.  J 161 

Petroleum 20 

Phelps,  Dodge  &  Co 375 

Pine  oil  412,  467,  495,  527 

Pine  tar  oil 476 

Platinum  ores   52 

Plummer,  John   130,  162,  195 

Pneumatic   flotation 434-437 

Pockels,  Agnes    598 

Pockels,  F 547 

Poole,    W 163,  238 

Port  Pirie   6,  89,  340 

Potter  process 6,  8,  10,  38,  50,  51,  56,  70,  74,  79,  83,  104,  116,  117,  124 

129,  181,  193,  196-198,  249,  328 

Potter  process,  Litigation  648,  660 

Potter  vs.  Broken  Hill  Proprietary  Co.,  Ltd 636 

Potter-Delprat  agreement   662 

Potter  Sulphide  Ore  Treatment  Co.  vs.  Minerals  Separation,  Ltd 661 

Preferential  process,  see  Differential  flotation. 

Prentiss,    F.    H 106 

Probert,  F.  H 68 

Processes,  History 151,  169 

Prosser,  W.   C 497 

Putz,    O 361 

Quincke,  G 599-608 

Ralston,  O.    C 498-500,   526 

Ramsden,    W 609-610 

Rayleigh,  Lord 611 

Read,   Tnomas   T 501 

Rees,  H.  N 183 

Residue,  Disposal  507 

Residuum  oil   53 

Revett,  Ben  S 502 

Richards,  Robert  H 10 

Richardson,   Clifford 613 

Rickard,  T.  A 11,  503,  504 

Rohland,  Paul   548 

Rolker,  C.   M 20,    21 

Ronnan,  Fred  P 57 

Rossland    62 

Roth,  Walther  A 532 

Rudorf,  G 78,  616 

St.  Joseph  Lead  Co 387 

Salinger,  Herbert  505 

Salt-cake  process   31,  50,  58 

Sancton,  A.   H 42,   43 

Sanders  process  164,  480 

Santa  Cecilia  Mine  .  .   327 


102  MISSOURI  SCHOOL  OF  MINES. 

Sawyer,  B 172 

Schmidt,   Hugo   F 572 

Schneider,  G.  W 300 

Scholtze,   G 301 

Schranz,   K 414 

Schwarz,  Alfred   415,  506 

Scott,  W.  A 239,   667 

Selective  notation,  see  Differential  flotation. 

Selwyn-Brown,  A 69,  132,  1G5 

Sewell,  F.  W 166 

Shellshear,  \V 304,  364,  507,  668 

Sherwood,  C.  F 527 

Siebenthal,  C.  E 240 

Silver  ores 282,  308,  327,  464,  472 

Silver  Peak   Mine    510 

Silverton,    Colo 461 

Simons,   Theodore    . . 508,    509 

Simpson,   W.    E 197,    198 

Slime    573 

Slime  agitation   438 

Slime  concentration    190 

Slime  settling    135 

Slime  treatment  159,  207,  365,  420 

Smith,  H.  Hardy   305,  510 

Smith,   R.  W 511,   512 

Snover,   G.   R 80 

Soap-bubbles 533,    569 

Soluble  components,  Effect  of 448 

Southeast  Missouri   387,  419 

Spencer,  J.  F 549 

Spicer,   H.   N 365 

Steckel,  A.  P 81 

Stieglitz,   Julius    550 

Stocker,  J 167,  168 

Storen,  R 133,  134 

Sulitjelma,  Norway    180,  181,  183 

Sulman,  H.  L 135,  241,  242,  366,  614 

Sulman  and  Picard  vs.  Wolf 636 

Sulman-Picard-Ballot   process    8 

Sulphide  Corporation  6,  10,  160,  162,  180,  243 

Sulphide  Corporation,  Litigation    632,  637,  652 

Summary    1910     175 

Summary  1912  V. .   260 

Summary  1915    522,   524,  529 

Surface-concentration    588 

Surface  tension   534,  536,  539,  542,  545,  546,  549,  554,  555.  577,  578, 

585,  587,  590,  598,  602-604,  607,  608,  617 

Svedberg,  Theodor 551 

Swart,  W.  G 129,  136 

Sweden    347 

Swinburne,    J 78,    616 

Tables   532,  543 

Tables  annuelles  543 

Taylor,  W.  W.   .  .  .  552 


MISSOURI  SCHOOL  OF   MINES.  103 

Telemarken  Copper  Mine 141 

Telluride  ore  . . : 308,  369 

Tellus   Limited 410 

Testing  for  flotation 10,  526,  528 

Testing  machine 511 

Timber  Butte  Milling  Co 379,  463,  508,  509,  515 

Tin  ore   109,  147,  179 

Tube  milling 447 

Tungsten  ore   109 

Tupper    C.    A 529 

Tywarnhaile  Copper  Mine    110 

Uranium    405 

Users  of  flotation  386 

Utah  Leasing  Co 505 

Vacuum  flotation   10,  92-98,  106-111,  117,  123,  134,  141,  146-150,  156, 

168,  181,  183,  257,  296,  480 
Vacuum-flotation,   see  also,  Elmore  process 

Valentine,  Octairo    45 

Valentiner,   S 421 

Van  Bemmelen,   J.  M 55£ 

Van  Meter,  J.  W 45,  46* 

Van  Meter  process 45,54 

Vanadium 405 

Walker,  Edward   83,  108-110,  1G9,  245,  368,  672,  673 

Walker,  T.  L 12,   246 

Washburne,  C.  W 6JI 

Washoe  Reduction  Works 485 

Water  Clarifying 593: 

Water,  Viscosity __. 612 

Water  surfaces,  Tension  of   77^ 611 

Wentworth,  H.  A 488 

West  End  Mill,  Tonopah 438- 

Western  Association  of  Technical  Chemists  and  Metallurgists 129' 

Whitaker,  W.  A 5301 

Wiggin,  A    F 402 

Williams,  Henry  D 517 

Willows,  R.  S ' 555 

Winklemann,  A 547,   556^ 

Wittich,  L.  L 247 

Wolf,  J.  D 674 

Wolf,  J.  D.,  Litigation   636r 

Wood,  Henry  E 306-308,  369,  370- 

Wood,  Henry  E.,  Litigation    638" 

Wood   creosotes    467" 

Wood  process1 307,  308,  325,  370,  518 

Wood  tar  oils 467 

Woodbridge,  D.  E 248 

Yeatman,    Pope    371 

Yerranderie  field    510 

Zinc    5,  6,  31,  44,  49,  58,  59,  83,   84,  103,  122,  130,  152,  157,  170,   173, 

177,  185,  186,  188,  200,  201,  206,  213,  215,  231,  240,  241,  245,  249,  250, 
263,  272,  275,  278,  282,  299,  303,  308,  337,  352,  372,  379,  383,  390,  397, 

404,  413,  424,  478,  488 


104  MISSOURI   SCHOOF  OF   MINES. 

Zinc  Corporation 137,  152,  170,  172,  206,  211,  213,  231,  236,  249,  272, 

340,  372,  390!  478 

Zinc  Corporation,  Litigation  675,  677 

Zinc  production  333 

Zsigmondy,   Richard    .   557 


MISSOURI  SCHOOF  OF  MINKS.  105 

PUBLICATIONS  OF  THE  MISSOURI 
SCHOOL  OF  MINES 

BULLETIN — GENERAL  SERIES. 

Vol.  1,  No.  1,  Dec.  1908.  The  human  side  of  a  mining  engineer's 
life.  Edmund  B.  Kirby.  (Commencement  address,  June  10th,  1908.) 

Vol.  1,  No.  2,  38th  Annual  Catalogue,  1909-1910. 

Vol.  1,  No.  3,  June,  1909.  Education  for  utilty  and  culture.  Calvin 
M.  Woodward.  (Tau  Beta  Pi  address.) 

Vol.  1,  No.  4,  Sept.,  1909.  The  history  and  the  development  of  the 
Cyanide  Process.  Horace  Tharp  Mann. 

Vol.  2,  No.  1,  Dec.,  1909.  The  Jackling  Field.  School  of  Mines  and 
Metallurgy. 

Vol.  2,  No.  2,  39th  Annual  Catalogue,  1910-1911.     (Out  of  print) 

Vol.  2,  No.  3,  June,  1910.  Some  of  the  essentials  of  success.  Charles 
Sumner  Howe.  (Commencement  address,  June  1st,  1910.) 

Vol.  2,  No.  4,  Sept.,  1910.  Friction  in  small  air  pipes.  E.  G.  Harris, 
Albert  Park,  H.  K.  Peterson.  (Continued  by  Technical  Series.  Vol.  1, 
No.  1  and  4.) 

Vol.  3,  No.  1,  Dec.,  1910.  Some  relations  between  the  composition 
of  a  mineral  and  its  physical  properties.  G.  H.  Cox,  E.  P.  Murray. 

Vol.  3,  No.  2,  March  1st,  1911.     40th  Annual  Catalogue,  1911-1912. 

Vol.  3,  No.  3,  June,  1911.  Providing  for  future  generations.  E.  R. 
Buckley.  (Tau  Beta  Pi  address,  May  24th,  1911.) 

Vol.  3,  No.  4,  Sept.,  1911.  Fall  announcement  of  courses.  (Out  of 
print.) 

Vol.  4,  No.  1,  Dec.,  1911.  Fortieth  anniversary  of  the  School  of 
Mines  and  Metallurgy  of  the  University  of  Missouri.  Parker  Hall  Me- 
morial address.  Laying  of  cornerstone  of  Parker  Hall,  Rolla,  Missouri, 
October  24th,  1911. 

Vol.  4,  No.  2,  March,  1912.     41st  Annual  Catalogue,  1912-1913. 

Vol.  4,  No.  3,  June,  1912.  Mining  and  civilization.  J.  R.  Finlay. 
(Commencement  address,  May  31st,  1912.) 

Vol.  4,  No.  4,  Sept.,  1912.     Fall  announcement  of  courses,     o.  p. 

Vol.  5,  No.  1,  Student  Life. 

Vol.  5,  No.  2,  March,  1913.     42nd  Annual  Catalogue,  1912-1913. 

Vol.  5,  No.  3,  Never  published. 

Vol.  5,  No.  4,  Never  published. 

Vol.  6,  No.  1,  Never  published. 

Vol.  6,  No.  2,  March,  1914.     43rd  Annual  Catalogue,  1913-1914. 

Vol.  6,  No.  3,  Never  published. 

Vol.  6,  No.  4,  Never  published. 

Vol.  7,  No.  1,  Never  published. 

Vol.  7,  No.  2,  March,  1915.     44th  Annual  Catalogue,  1914-1915. 

Vol.  7,  No.  3,  June,  1915.  Description  of  special  courses  in  oil  and 
gas  and  allied  subjects. 

Vol.  7,  No.  4,  September,- 1915.     Register  of  Graduates,  1874-1915. 

Vol.  8,  No.  1,  Jan.,  1916.  Bibliography  on  Concentrating  Ores  by 
Flotation.  Jesse  Cunningham. 


1106  MISSOURI   SCHOOL  OF   MINKS. 

BULLETIN— TECHNICAL    SERIES. 

Vol.  1,  No.  1,  November,  1911.  Friction  in  air  pipes.  E.  G.  Harris, 
•(Continuation,  of  General  Series,  Vol.  2,  No.  4). 

Vol.  1,  No.  2,  February,  1912.  Metallurgy  and  ore  dressing  lab- 
oratories of  the  Missouri  School  of  Mines  and  Metallurgy.  D.  Cope- 
land,  H.  T.  Mann,  H.  A.  Roesler.  (Out  of  print.) 

Vol.  1,  No.  3,  May,  1912.  Some  apparatus  and  methods  for  demon- 
strating rock  drilling  and  the  loading  of  drill  holes  in  tunneling.  Lt. 
E.  Young. 

Vol.  1,  No.  4,  August,  1912.  Friction  in  air  pipes.  E.  G.  Harris. 
\( Continuation  of  Vol.  1,  No.  1,  November,  1911.) 

Vol.  2,  No.  1,  August,  1915.  Comparative  Tests  of  Piston  Drill  Bits. 
C.  R.  Forbes  and  L.  M.  Cummings. 

Vol.  2,  No.  2,  November,  1915.  Orifice  Measurements  of  Air  in  Large 
Quantities.  Elmo  G.  Harris. 

Vol.  2,  No.  3,  February,  1916.  Cupellation  Losses  in  Assaying.  Horace 
T.  Mann  and  Charles  Y.  Clayton.  (In  press.) 


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